Ethereum's Glamsterdam Bet: More Capacity, New Coordination Risk

What changed: Ethereum core contributors reported a stable multi-client Glamsterdam development network using the latest versions of enshrined proposer-builder separation, gas repricing, and block-level access lists. Access lists give clients advance information about the state a block will touch, enabling more parallel work. Enshrined proposer-builder separation moves a critical block-building relationship into the protocol rather than relying on outside relays. The combined design is intended to support a higher gas limit while reducing a current trust dependency in block production.

Who bears risk: client teams must implement complex consensus and execution changes consistently; validators and builders must adapt infrastructure; applications and users bear the effects of instability, delayed inclusion, or fee surprises. Higher capacity can also increase node resource demands and pressure smaller operators. A successful interop week is not mainnet proof. BLAKE should follow client diversity, devnet failures, specification changes, benchmark assumptions, node requirements, builder concentration, and incident response rather than presenting a target gas limit as delivered scale.

What remains open: no mainnet date is fixed, gas-limit goals depend on testing, and interactions among repricing, access lists, builders, and client performance may still change. The upgrade also does not settle longer-term questions about censorship resistance or account abstraction. A BLAKE upgrade file should separate proposed, selected, implemented, devnet-tested, testnet-activated, and mainnet-activated states. It should record which clients participated and what broke at each stage, giving readers an engineering status report rather than a promotional roadmap.