Fresh off the successful launch of Ethereum’s latest upgrade, Pectra, developers are already gearing up for their next big milestone called “Fusaka.” Scheduled for deployment by the end of 2025, Fusaka has the Ethereum community buzzing with excitement and skepticism in equal measure.

Pectra, recently deployed after multiple delays, was Ethereum’s most significant upgrade since “the Merge” in 2022. It introduced vital improvements like easier staking options for institutions, better wallet accessibility, and enhanced transaction efficiency.

Fusaka aims to further transform Ethereum by including a major technical feature known as “PeerDAS” (Peer Data Availability Sampling). PeerDAS addresses a critical issue—data availability—by allowing Ethereum validators to check transaction data efficiently. Instead of downloading entire “blobs” of transaction data stored off-chain, validators would only need partial data. This method significantly reduces the workload and potentially slashes transaction costs.

“PeerDAS is super important since we want to help layer-2s scale,” said Parithosh Jayanti, a devops engineer at the Ethereum Foundation. “PeerDAS allows us to bump the blob limit significantly.”

The introduction of blobs, first implemented in the Dencun upgrade, has already proven vital in supporting Ethereum’s rapidly growing layer-2 solutions such as Arbitrum, Optimism, and Coinbase’s Base. These platforms significantly cut transaction fees and enhance processing speed compared to Ethereum’s main chain.

However, the Ethereum community remains cautiously optimistic. The project’s history is filled with delays, as seen with Pectra, originally slated for late 2024, which only saw daylight in May 2025 after several postponements.

This ongoing trend of delayed upgrades has sparked criticism from within the community. Ethereum’s market price stagnation and the migration of developers to rival ecosystems have raised questions about the efficiency and leadership capabilities of the Ethereum Foundation.

While the promised benefits of Fusaka—particularly lower costs for layer-2 users and validator operations—are exciting, the community is left wondering if Ethereum developers can deliver this upgrade as planned or if more delays are inevitable.

We haven’t yet the fundamental limits of what we can do.

Ethereum should reach the efficient frontier of what’s possible before arguing about how we would choose between our values once we’ve hit those limits.

Shipping faster will help Ethereum get there.

Instead of “should we… pic.twitter.com/34uvM4D1S0

— Georgios Konstantopoulos (@gakonst) January 25, 2025

Only time will tell if Fusaka’s promise of a more affordable and scalable Ethereum will be fulfilled on schedule or suffer familiar setbacks.