Vitalik Buterin said Ethereum layer-2 networks must be reconceived as specialized platforms rather than as parallel execution layers, declaring that the original "branded shards" vision "no longer makes sense" given the base chain's faster-than-expected throughput gains.

The Ethereum co-founder's remarks, posted to X, land as ether trades near $2,267, down roughly 30% over the past month and 54% below its all-time high. Bitcoin sat at $76,063, off 3.4% over 24 hours, according to the latest market data.

What is driving the rethink?

Buterin argued that Ethereum's layer-1 base is scaling directly, eliminating the throughput rationale for rollups. "Ethereum itself is now scaling directly on layer 1, with large planned increases to its gas limit this year and the years ahead," he wrote.

The shift reframes competition for chains including Arbitrum, Optimism, and Base, which together hold tens of billions of dollars in total value locked. Until now, those networks positioned themselves as the primary destination for cheaper transactions, while Ethereum handled settlement and security.

What does Buterin propose instead?

Rather than competing on raw throughput, layer-2s should differentiate through specialized features, Buterin said. He outlined several categories:

• Privacy-focused virtual machines
• Application-specific efficiency gains
• Ultra-low-latency sequencing
• Non-financial designs for social or identity use cases
• Built-in oracles and dispute resolution mechanisms

"We can think of layer 2s as being a full spectrum," Buterin wrote.

What are the decentralization concerns?

Several major layer-2 networks still rely on centralized sequencers, the off-chain components that batch and order user transactions before posting them to Ethereum. Arbitrum's sequencer sits with Offchain Labs, the network's developer team. Coinbase, Base's creator, similarly controls its sequencer.

In his post, Buterin proposed that any layer-2 using ETH or Ethereum-issued assets reach at least stage-one decentralization — what he has previously described as "limited training wheels." Networks that skip those standards should be treated as independent layer-1 chains connected by bridges.

What is the practical effect for users?

The reclassification carries direct implications for cross-chain security assumptions. A rollup meeting stage-one standards inherits stronger guarantees from Ethereum settlement. A chain without those commitments carries bridge risk closer to that of an alt-layer-1.

Buterin framed the new model as a "full spectrum" of Ethereum-aligned chains, ranging from tightly secured rollups to loosely connected networks optimized for narrow use cases. Users and applications would weigh each option based on requirements.

What happens next?

Buterin's commentary signals an ongoing protocol-level conversation rather than a formal Ethereum Improvement Proposal. Layer-2 teams now face pressure to publish decentralization roadmaps and sequencer-distribution timelines if they want continued alignment with Ethereum's core security model.

Gas-limit increases slated for 2026 could further compress the cost differential between layer-1 and rollup execution, sharpening the competitive case for differentiation over duplication.