Ethereum's latest network upgrade, nicknamed Fusaka, has gone live with changes aimed at making layer-2 networks cheaper and validators easier to operate, the most consequential protocol change since last year's Pectra release.

The headline feature is PeerDAS, a data-availability mechanism that lets rollups post data more efficiently to the base layer. By spreading data across the network rather than requiring every node to process all of it, Fusaka is designed to lower transaction fees on scaling solutions built on top of Ethereum.

The upgrade also raises the maximum effective validator balance from 32 ETH to 2,048 ETH. The change allows operators to manage far larger stakes through a single validator, reducing the technical overhead and fragmentation that previously forced large stakers to run dozens of separate nodes.

Developers say the combined effect should improve both user experience and network economics. Cheaper layer-2 transactions could pull activity back toward Ethereum-aligned rollups, while streamlined staking may attract institutional participants wary of operational complexity.

Fusaka is one step in a longer roadmap. The next major upgrade, Glamsterdam, is targeted for the second half of 2026 and is expected to address latency and further scaling headroom.

Not everyone is convinced the benefits will arrive cleanly. Some researchers warn that new data-availability schemes add complexity and could introduce subtle security trade-offs. For now, the upgrade marks continued incremental progress on a network that hosts the bulk of decentralized finance.

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