Ethereum’s next major upgrade, Glamsterdam, is now moving beyond the roadmap stage into real implementation as it enters advanced devnet testing. Core developers are currently focused on stabilizing all major features inside a more generalized testing environment, especially ePBS and bundled gas fee adjustments, before pushing it toward public testnets and eventually a mainnet fork. This signals that Ethereum’s discussion has shifted from high-level design into serious cross-client technical validation.
From a technical standpoint, Glamsterdam introduces several major upgrades that are critical for Ethereum’s long-term scalability. The centerpiece is enshrined proposer-builder separation, alongside greater parallel execution capacity, higher gas limits, and support for larger contracts. If these components are deployed safely, Ethereum should be able to process much larger Layer 2 and rollup activity while helping transaction costs remain more efficient. The improvements may not always be directly visible on the base layer, but the ecosystem built on top of it could become significantly faster, cheaper, and more stable.
Even with strong progress, this remains the most delicate phase because it touches Ethereum’s core consensus and execution logic. Any feature considered too complex or not sufficiently safe may still be pushed into the later Hegota upgrade scheduled for the end of the year. For now, market participants and validators will be watching the devnet results, security audits, public testnet activation, and the eventual mainnet fork timeline. If everything proceeds smoothly, Glamsterdam could become one of Ethereum’s most important upgrades in strengthening its rollup-centric scaling strategy throughout 2026.
