A technical debate now active on r/ethereum around the proposed Glamsterdam upgrade suggests Ethereum mainnet could move from roughly 60 million gas to around 200 million per block, and if that trajectory holds, the rollups-first scaling narrative that has defined Ethereum's roadmap for three years needs a serious reexamination.
Ethereum's scaling story has been told in one direction for long enough that it has started to feel like settled doctrine: the base layer secures and settles, rollups handle execution, and anyone who wants cheap transactions routes through an L2. That framing served a real purpose when mainnet was genuinely constrained, but a confluence of proposals now being discussed under the Glamsterdam umbrella is challenging whether the constraint needs to be as tight as it has been. Hasu's analysis, which has been circulating in Ethereum research channels, frames the potential shift clearly: enshrined proposer-builder separation, block access lists enabling prefetching and parallel execution, and targeted gas repricing for state-growth operations could together support a roughly threefold increase in mainnet gas capacity without the node centralization risks that have historically made large gas limit increases radioactive in core developer discussions.
The three technical components deserve to be understood separately because they address different bottlenecks. Enshrined proposer-builder separation, which moves the MEV supply chain from an informal off-protocol arrangement into the protocol itself, matters for gas limit increases because it changes who bears the computational burden of building large blocks. Under the current architecture, large blocks create outsized pressure on validators who must process them within tight time windows. Separating the builder role formally allows specialized actors to handle block construction while validators focus on attestation, which relaxes one of the practical constraints on increasing throughput. Block access lists allow the network to prefetch state before execution begins, enabling parallel processing of transactions that touch different parts of the state tree simultaneously. Gas repricing for state-heavy operations addresses the third constraint: if operations that write to or expand the state tree carry costs that reflect their actual long-term burden on the network, the composition of a larger block becomes less dangerous even when its raw gas weight increases.
The implications for the rollup ecosystem are not straightforward, and anyone framing Glamsterdam as simply good news for Ethereum users without examining the second-order effects is missing the more interesting part of the story. Rollup business models, particularly for the larger sequencer-operated chains like Arbitrum, Optimism, and Base, depend on a specific economic structure: they batch L2 transactions, post compressed data to Ethereum mainnet, and capture the difference between what users pay on L2 and what it costs to settle on L1. As L1 capacity increases and base fees structurally decline, the cost of posting data to mainnet falls, which benefits rollup operators on the cost side. But a meaningfully more capable mainnet also changes the deployment calculus for application developers deciding whether to build on L1 directly or route through an L2.
For high-value, low-frequency applications where settlement finality and composability with mainnet liquidity matter more than transaction throughput, a mainnet that can process significantly more computation per block starts to look attractive again. DeFi protocols that currently deploy on L2 partly because mainnet fees make them inaccessible to ordinary users might reconsider if those fees fall substantially. That would not destroy rollup demand, but it would segment it differently, with L2s increasingly serving the high-volume, latency-sensitive use cases where their throughput advantages are unambiguous, while some application categories migrate back toward mainnet deployment.
Sequencer revenue is the variable most directly exposed to this dynamic. The largest rollup operators generate meaningful income from sequencer operations, and that income is partly a function of the gap between L2 user fees and L1 settlement costs. Danksharding and EIP-4844's blob transactions already compressed that gap significantly in 2024. A Glamsterdam upgrade that increases L1 capacity further would continue the compression. Rollup operators who have been building toward decentralized sequencer networks and exploring new revenue models, Arbitrum's fee-sharing proposals, Optimism's Superchain architecture, Base's builder ecosystem strategy, are largely anticipating this transition. The ones that treated sequencer revenue as a permanent structural advantage rather than a transitional one are the ones with the harder adjustment ahead.
The node centralization and state bloat risks that do not disappear
The technical safeguards in the Glamsterdam proposal are real, but they do not eliminate the concerns that have made large gas limit increases controversial in Ethereum core development circles for years. A 200 million gas block is a fundamentally different computational object than a 60 million gas block, and the requirement to process it within the same slot time window places greater demands on node hardware regardless of how well the workload is parallelized. Home validators running consumer hardware are the constituency most at risk from this pressure. Ethereum's social commitment to solo staking accessibility is not just idealistic; it is a meaningful decentralization property that would be degraded if gas limit increases push minimum viable validator hardware into a specification bracket that excludes ordinary participants.
State bloat is the slower but more persistent risk. Gas repricing that raises the cost of state-expanding operations will reduce reckless state growth at the margin, but it does not address the accumulated state from the years before those repricing changes take effect. Ethereum's state size is already large enough that full sync times for new nodes are measured in days rather than hours, and a higher gas limit that accelerates state growth even modestly compounds a problem that already has no clean solution short of statelessness, which remains years away from mainnet deployment.
The Glamsterdam debate is worth following closely precisely because it represents a genuine tension in Ethereum's design philosophy rather than a straightforward improvement. The rollup-centric roadmap was always a pragmatic response to base layer constraints, not an ideological commitment to L2 execution for its own sake. If those constraints can be responsibly relaxed, the architecture of the Ethereum application ecosystem will shift accordingly, and the startups, protocols, and investors who understand that shift before it becomes consensus will be better positioned for what the network looks like on the other side of it.
Also read: Iran's Largest Crypto Exchange Has a Hidden Political Dynasty at Its Core and the Compliance Industry Should Be Taking Notes • Bitcoin Just Posted Its Best Monthly Performance in a Year and the More Interesting Question Is What Actually Drove It • Trump-Linked Crypto Projects Are Becoming a Live Test of Whether the U.S. Regulatory System Can Handle Political Memecoins
