Ethereum executives warn that if the Fusaka upgrade scheduled for the end of this year is delayed, it could affect Ethereum's overall roadmap. (Background: Grayscale report: institutional influx, regulatory approval, multiple positive factors behind Ethereum's strong rise) (Additional background: Vitalik Buterin calls for Ethereum to abandon Optimistic and designate ZK as the orthodox solution; is this foresight or a dictatorship that stifles the ecosystem?) Ethereum Foundation Executive Director Tomasz K. Stańczak posted on social media, stating that if the Fusaka upgrade cannot launch on the mainnet as scheduled in early November 2025, discussing Ethereum's roadmap and vision would be "meaningless." He reminded the developer community not to focus solely on Glamsterdam in 2026 but to prioritize ensuring that the current timeline is met. Glamsterdam may be getting some attention (it is a fork for Q1/Q2 2026). In the meantime, we should be more concerned about any potential delays to Fusaka (Q4 2025). As I have said many times, no amount of talking about Ethereum's roadmap and vision matters if we cannot achieve… — Tomasz K. Stańczak (@tkstanczak) August 8, 2025 Is the Fusaka timeline too tight? The goal of the Fusaka upgrade is to introduce PeerDAS and Verkle trees, increasing Layer 2 data capacity and lowering transaction fees. According to the official schedule, the mainnet upgrade is expected to launch between November 3 and 6, 2025. The Ethereum development team acknowledged that this is a "radical but feasible" plan, but they encountered issues such as synchronization delays and node crashes during early testing. To reduce risks, EIP-7907 has been removed from the upgrade content to simplify Fusaka. If we cannot maintain a collaborative standard of meeting deadlines repeatedly, then discussing Ethereum's roadmap and vision is meaningless. Stańczak emphasized the link between development timelines and market trust; delays not only indicate functionality lags but may also undermine investors' and developers' long-term commitments to the ecosystem. This is evident for Ethereum's goal of becoming a "world bank ledger," as the foundation's executives appear more leader-like than before. Glamsterdam is on the horizon, and developers face dual pressures. While Fusaka is still in the sprint, Glamsterdam is also scheduled for release in the first half of 2026. The core team is discussing halving block time to 6 seconds, raising the gas limit, and introducing block-level access lists (EIP-7928) and FOCIL. According to the deadline, all features must be finalized by August 21, 2025, and the dual timelines for the two upgrades further tighten Ethereum's famous "careful development" practice. Timely delivery is crucial for the trust in the "global computer." Stańczak hopes that Ethereum can achieve a mainnet throughput of 400 TPS within ten years and advance to 10,000 TPS through "Lean Ethereum" and zkEVM technology. To this end, his company Nethermind is investing in contract auditing automation to ensure execution safety and predictability. Fusaka and Glamsterdam are thus seen as important checkpoints for assessing the current "calls for reform from the Ethereum Foundation" development efficiency. Related reports: Vitalik Buterin calls for Ethereum to abandon Optimistic and designate ZK as the orthodox solution; is this foresight or a dictatorship that stifles the ecosystem? Are Ethereum whales afraid of selling off? "Holding 1 million ETH OG" sold off and repurchased ETH a year later, currently holding 59,718 ETH. "Ethereum Executive Director urges development: the Fusaka upgrade at the end of the year cannot be delayed, otherwise discussing the roadmap is meaningless." This article was first published by BlockTempo (the most influential blockchain news media).

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