Ethereum’s Major Fusaka Upgrade Scheduled for November 2025

Fusaka: Key Updates and Why They Matter

What is Fusaka? It is the next major upgrade after Pectra. Its goal is to make the network faster, cheaper, and more resilient. Ethereum is no longer an experiment for enthusiasts; it is expected to offer stability, predictable fees, and high throughput. Increasing traffic, the rise of L2 solutions, and growing competition for developers and users are forcing the ecosystem to evolve more quickly.

The proposals included in the update (known as EIPs – Ethereum Improvement Proposals) aim to optimize network performance and lower transaction costs. When blocks process faster, fees go down, and finality (how quickly transactions become permanent) takes less time, everyone benefits from dApp users to developers and L2 operators.

Many of the EIPs in Fusaka were actively discussed at Glamsterdam, an open technical event where developers, validators, and researchers debate controversial ideas, find compromises, and refine proposals into working specifications. This is where future changes to Ethereum are put through a real-world sanity check. Ethereum validators highlighted the significance of these changes:

EIP-7251: What Changes for Validators

The most heated discussion at Glamsterdam was around EIP-7251. 

Here’s why EIP-7251 matters: this proposal increases the maximum amount of ETH a validator can stake from 32 ETH to 2048. In simple terms, if adopted, it would allow large participants to stake more funds without having to spin up dozens of validator nodes. Previously, staking 2048 ETH required 64 nodes. Under the new rule, only one would be needed.

While this reduces operational costs, there’s a significant trade-off. It is particularly advantageous for staking providers. And most concerning, the concentration of ETH in the hands of a few large validators will inevitably weaken decentralization. The largest staking pool, Lido, already controls about 30% of the network’s validators. Ethereum Foundation has already faced criticism for sliding into centralized governance, and EIP-7251 is likely to intensify that debate. It will become difficult to describe Ethereum as a truly decentralized platform.

Some community members have proposed tracking validator shares and possibly introducing soft limits or warning signals to maintain balance. But this remains an open issue. The community is clearly divided between those who champion efficiency and those who warn of lost independence.

Other Fusaka EIPs: Straight to the Point

Fusaka is not just about simplifying staking. It includes a number of proposals addressing architecture, security, and data handling.

Here are some highlights:

• EIP-7594 (PeerDAS) improves data availability by allowing nodes to download only a portion of the data instead of the full payload. This reduces load and speeds up Layer 2 solutions. PeerDAS is a crucial step toward Danksharding (Ethereum’s future scaling solution). It introduces distributed data verification, where the network shares processing tasks instead of overloading individual nodes. This is precisely what full sharding will require.
• EIP-7825 (Gas Limit Cap) sets a gas ceiling for a single transaction (for example, 30 million units), to ensure that a large operation doesn’t occupy an entire block and block other transactions. This makes network behavior more stable and predictable.
• EIP-7692 (EVM Object Format) is a set of EIPs that revamp the internal structure of smart contracts in the Ethereum Virtual Machine. EOF introduces modularity, removes self-modifying contracts (contracts that can alter their own code during execution – which complicates auditing and increases risk), adds headers, and simplifies validation. This lays a foundation for the next generation of contracts. While rollout may be gradual, the direction is already set.

• EIP-7917 enables prediction of which validator will be selected to propose the next block. This matters for Layer 2 sequencers (nodes responsible for ordering transactions before they’re posted to the mainnet) because it lets them coordinate in advance with the base layer, avoiding conflicts and delays. Predictability at this level helps preserve consensus between layers.
• EIP-7892 allows updates to blob parameters (data storage settings for large data chunks stored separately from the main block and primarily used by L2s) without requiring a full hard fork. This streamlines future changes related to data storage and access.

What Changes for Users, Developers, and Stakers

Users will benefit from lower gas fees, faster transactions, and an overall smoother experience with dApps. Predictable costs make on-chain interaction easier to manage.

Developers gain a more stable and understandable infrastructure. This shortens development cycles and reduces maintenance costs. Teams working on L2 and DeFi will notice this most. EOF and PeerDAS lower technical barriers and expand functionality.

Stakers (especially those handling large amounts) will manage their assets more efficiently. EIP-7251 reduces technical overhead and makes participating in network security more practical. Still, the community will be watching closely to make sure these benefits don’t come at the cost of decentralization.

Fusaka and Ethereum’s Trajectory

Fusaka continues the path started by Pectra and moves Ethereum toward better scalability without compromising security (though centralization risk is present). While Pectra focused on foundational architecture, Fusaka emphasizes finality and L2 coordination. It lays the groundwork for the next major phase: Danksharding, which will distribute data storage across network segments (shards) and massively boost capacity. PeerDAS already prepares nodes for this scenario.

Fusaka also makes future upgrades easier: EIP-7892 removes the need for hard forks when blob parameters change. This means Ethereum can adapt more quickly without compromising stability. The end result is a more flexible, scalable, and resilient platform – one that can support billions of users without morphing into a centralized monolith.

Fusaka introduces tangible, concrete changes. These changes position Ethereum for the next phase of blockchain adoption, where the network must handle billions of users without sacrificing its decentralized foundation.