Ethereum Glamsterdam: The Upgrade That Could End Four Years of ETH Underperformance
The last time the ETH/BTC ratio sat this low — hovering near 0.028 — Ethereum went on to outperform Bitcoin by more than 60% over the following three months. That was Q4 2023. Before that, in Q2 2019, an almost identical setup preceded an 80% relative outperformance. Pattern recognition is not prophecy, but with Ethereum's most consequential upgrade since The Merge now targeting a May/June 2026 launch, the setup looks uncomfortably familiar.
Glamsterdam is Ethereum's next hard fork. It is not an incremental patch. It is a structural overhaul of two of the protocol's most contested failure modes: the extraction of value by a small set of privileged actors through Maximal Extractable Value (MEV), and the sequential bottleneck that prevents Ethereum's Layer 1 from competing on raw throughput with Solana, MegaETH, and Monad. Whether Glamsterdam delivers on both counts will determine whether Ethereum's four-year underperformance against Bitcoin is a structural story — or merely a sentiment cycle waiting for a catalyst.
From Pectra to Glamsterdam: Building the Performance Stack
To understand what Glamsterdam is, you first need to understand what Pectra delivered. The Prague-Electra upgrade went live on mainnet on May 7, 2025, and introduced eleven changes to the Ethereum protocol — two of which matter most for the trajectory leading to Glamsterdam.
EIP-7702 gave externally owned accounts (EOAs) the ability to temporarily execute smart contract logic during a transaction. In practical terms, this means a regular Ethereum wallet can now batch multiple operations, sponsor gas on behalf of users, or delegate to alternative key schemes — without requiring users to migrate to a smart contract wallet. For developers, EIP-7702 collapsed the distinction between EOA and account abstraction use cases, removing a major barrier to consumer-grade onboarding.
EIP-7691 doubled Ethereum's blob-carrying capacity. The target blob count per block moved from 3 to 6, with the maximum rising from 6 to 9. Blobs — introduced in EIP-4844 (Dencun, March 2024) — are temporary data packets used by Layer 2 rollups to post transaction data to Ethereum cheaply. Doubling the target count means more L2 throughput at lower cost, extending Ethereum's position as the settlement layer for a rollup-centric ecosystem.
Pectra, in other words, was about making Ethereum easier to use and cheaper to build on. Glamsterdam is about making Ethereum itself faster and fairer.
The Two-Headed Upgrade: Amsterdam and Gloas
The name Glamsterdam is a portmanteau of the upgrade's two simultaneous components: Gloas (the consensus layer) and Amsterdam (the execution layer). Each carries one headliner proposal that addresses a distinct systemic problem.
ePBS (EIP-7732): Bringing Block Building Into the Protocol
The consensus layer upgrade's centerpiece is Enshrined Proposer-Builder Separation, tracked as EIP-7732. To understand why this matters, you need to understand what Ethereum's current block-building process looks like.
Under the current system, approximately 80–90% of Ethereum blocks are built using MEV-Boost, a third-party relay system that allows specialized actors called "builders" to construct blocks and submit them to validators for proposal. This arrangement emerged organically because builders — with sophisticated algorithms for transaction ordering and arbitrage extraction — can produce more profitable blocks than most validators can on their own. Validators accept these blocks because they earn more MEV. The relay acts as the trusted intermediary.
The problem is architectural: a critical piece of Ethereum's block production pipeline depends on off-protocol infrastructure that validators have no choice but to trust. If a dominant relay goes offline, acts maliciously, or begins censoring transactions, there is no in-protocol recourse.
EIP-7732 removes the relay entirely. It bakes the builder-proposer relationship directly into Ethereum's consensus layer, enforcing at the protocol level what MEV-Boost enforces through trust. Under ePBS, block building and block proposing become formally separated roles within the protocol itself — builders submit bids, proposers commit to the highest bid, and the process is governed by cryptographic commitments rather than a third-party relay.
The downstream effects are significant. MEV extraction could be reduced by up to 70% through fairer, more transparent distribution. Home stakers — who currently struggle to compete with institutional validators who run sophisticated MEV strategies — gain parity. And Ethereum's censorship resistance improves materially, because the protocol can now enforce inclusion rules without depending on relay behavior.
Block-Level Access Lists (EIP-7928): Unlocking Parallel Execution
The execution layer upgrade (Amsterdam) is anchored by EIP-7928, which introduces Block-Level Access Lists (BALs). This is the architectural foundation for Ethereum's throughput ambitions.
Currently, Ethereum processes transactions sequentially. Each transaction is executed one at a time, in order, which caps how many can be processed per second regardless of how powerful the nodes running the network are. This sequential model is the primary reason Ethereum's Layer 1 throughput has remained constrained while chains like Solana — which parallelizes execution — can process far more transactions per second.
BALs work by recording, at the block level, every account and storage slot accessed during execution, along with their post-execution values. This block-wide access map enables three categories of parallelism that are currently impossible: parallel disk reads (nodes can pre-fetch all storage locations instead of reading them sequentially), parallel transaction validation (independent transactions can be verified simultaneously), and parallel state root computation (the Merkle tree update at the end of each block becomes distributable across threads).
The result is a significant reduction in worst-case block validation latency. Faster validation enables the network to safely increase gas limits without compromising node performance — which translates directly to higher throughput and lower per-transaction gas fees. Early analyses suggest gas fees could drop by approximately 78% as capacity increases.
The ETH/BTC Ratio: A Four-Year Compression Looking for Release
The ETH/BTC ratio has declined for most of the past four years. Despite Ethereum processing more economic activity than any other smart contract platform — and despite the Merge reducing ETH issuance by roughly 90% — ETH has lost ground against Bitcoin in nearly every measurable way since late 2021. Even the launch of spot Ethereum ETFs, which generated $6.5 billion in assets under management for BlackRock's ETHA product, failed to close the gap.
The explanations are not difficult to find. Bitcoin captured the bulk of institutional capital inflows following the approval of spot Bitcoin ETFs in January 2024. Narrative fragmentation — as Ethereum's roadmap split attention between the base layer, L2 scaling, and account abstraction — made it harder to communicate a simple value proposition to generalist investors. And the shift to a rollup-centric architecture, while technically correct, temporarily reduced base-layer fee revenue as L2s consumed blob space rather than L1 blockspace.
But April 2026 brought something new. The ETH/BTC ratio ticked up from its 0.028 lows. ETH began outperforming Bitcoin in a market environment where previous instances of this pattern — Q2 2019 and Q4 2023 — preceded substantial relative outperformance over the following quarter.
Two events provided fundamental support. First, BlackRock's iShares Staked Ethereum Trust ETF (ETHB) launched on Nasdaq on March 12, 2026, pulling $155 million in first-day inflows. ETHB combines spot ETH price exposure with staking rewards, giving institutional investors access to a yield-generating crypto position for the first time through a regulated vehicle. Second, Grayscale's Ethereum Staking ETF (ETHE) had been live since October 2025, and the combined presence of two staking ETF products from major issuers signals that institutional infrastructure around ETH yield is becoming a standard feature, not an experiment.
Whether the ETH/BTC ratio continues to recover depends heavily on whether Glamsterdam ships on schedule and delivers measurable improvements.
Three Milestones Glamsterdam Must Deliver
The framework for evaluating Glamsterdam's success is concrete:
1. Demonstrate that BALs meaningfully increase L1 throughput. The Glamsterdam devnets being stress-tested in Q1 2026 will produce early data on whether parallel execution through EIP-7928 delivers real-world latency reductions. Ethereum does not need to match Monad's 10,000 TPS claims or MegaETH's 100,000 TPS aspirations immediately — but it needs to show a credible path to competitive L1 performance that can be communicated to developers evaluating chain choices.
2. Show that ePBS reduces validator concentration without breaking block production. The current MEV-Boost ecosystem has created meaningful concentration among a small number of sophisticated builders and relay operators. EIP-7732 is designed to distribute this power more evenly, but the transition carries execution risk: if ePBS implementation is buggy or if builder incentives shift in unexpected ways post-upgrade, the results could be the opposite of intended. A clean ePBS launch with measurable reduction in builder concentration would be a significant signal.
3. Maintain EVM composability throughout. Ethereum's competitive moat against high-performance chains is not raw throughput — it is the composability of a unified execution environment where thousands of protocols interact trustlessly. Any performance optimization that fragments this composability (by, for example, requiring developers to annotate transactions with access lists in ways that break existing code) would damage the very thing that makes Ethereum worth optimizing. The BAL implementation must be backward compatible and transparent to developers writing Solidity.
What Glamsterdam Means for Developer Chain Choice
The mid-2026 Glamsterdam timeline creates a concrete decision window for developers who are currently evaluating whether to build on Ethereum L2s, deploy native contracts on Solana, or experiment with new high-performance EVMs like Monad or MegaETH.
If Glamsterdam ships on schedule and delivers its targeted improvements, several things follow. Gas fees on Ethereum L1 drop substantially, making direct L1 deployment economically viable for a broader class of applications. ePBS reduces the MEV tax that DeFi protocols pay on every swap, lending transaction, and liquidation — improving the economics for protocols and users alike. And the demonstration of working parallel execution at the L1 level provides a technical foundation for future throughput increases that don't require the architectural tradeoffs of rollup-based scaling.
If Glamsterdam slips or underdelivers, the competitive pressure from chains that already have parallel execution running in production will increase materially. Monad's mainnet launched in April 2026. MegaETH was earlier in 2026. Both are EVM-compatible, both claim throughput that dwarfs current Ethereum L1, and both are actively competing for Ethereum developers.
The developer base that Ethereum has accumulated over eight years is its most durable competitive advantage. Glamsterdam's primary job is to demonstrate that this developer base does not need to choose between security and performance — that Ethereum can eventually provide both.
The Upgrade Catalyst Pattern
EIP-1559 was deployed as part of the London Hard Fork on August 5, 2021. Before the upgrade, analysts projected a range of outcomes — from negligible short-term price impact to a possible quintupling of ETH value. What happened was more nuanced: the deflationary pressure from fee burning took months to register as net ETH supply reduction, but the combination of the upgrade narrative, changing supply dynamics, and macro tailwinds contributed to ETH reaching its all-time high in November 2021 — roughly three months after London.
The pattern is not that upgrades cause immediate price movements. The pattern is that upgrades which deliver genuine structural improvements give institutional capital a narrative framework to act on sentiment that was already building. Glamsterdam, combined with a four-year ETH/BTC compression at historical lows, the launch of staking ETFs providing institutional yield access, and a high-performance EVM arms race that puts pressure on Ethereum to demonstrate L1 competitiveness — creates a similar convergence of structural and narrative factors.
Whether history repeats depends on execution. Glamsterdam targeting May or June 2026 for mainnet means the launch window is near. The devnets are running. The EIPs are specified. The developers across Geth, Besu, Prysm, and other client teams are stress-testing cross-client compatibility.
The upgrade is real. The question is whether Ethereum's ability to ship it cleanly matches the weight of what's being asked of it.
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