Long-Divided Must Unite, Long-United Must Divide: When L1 Becomes Its Own Rollup, What Is Ethereum's Endgame?
"The Inevitable Cycle: When L1 Becomes Its Own Rollup – What is Ethereum's Endgame?"
For years, the Ethereum community grappled with concerns that L2s were fragmenting the ecosystem and eroding L1's value. While L2s provided cheaper execution, they also splintered liquidity and the unified user experience of a single chain. This has prompted a fundamental reassessment of the relationship between L1 and L2.
Ethereum's roadmap is evolving. The "Scale" initiative merges L1 and L2 expansion into a holistic framework. L1 itself is advancing with higher gas limits, statelessness, and zkEVM verification, no longer content to be just a low-throughput settlement layer. Consequently, the primary value proposition of L2s is shifting from merely providing cheap blockspace to offering L1 cannot easily provide: application-specific optimizations, privacy features, and flexible governance models. L2s are becoming a spectrum of execution environments with varying degrees of security inheritance from Ethereum.
A critical challenge in this multi-chain future is interoperability. The vision is to make Ethereum "feel like one chain again." This relies on advancements in native account abstraction (like EIP-7702) and intent-based architectures (Open Intents Framework), where users declare desired outcomes, and solvers handle the complex cross-chain execution. Furthermore, shortening Ethereum's finality time from minutes to seconds is crucial, as it underpins trust between chains for bridges, stablecoins, and cross-chain applications.
Perhaps the most provocative idea is that Ethereum L1 itself could become a form of "its own Rollup." As zkEVM and proof systems mature, high-performance nodes could execute transactions and generate validity proofs. Regular validators would then verify these proofs instead of re-executing all transactions. This blurs the traditional L1/L2 hierarchy, making "Rollup" more of a general execution-verification architecture. Native Rollup aims to integrate L2 validation more directly into the Ethereum protocol, allowing L2s to inherit L1's security more fully and move away from reliance on security councils.
In the end, L2s are not destined to replace L1 or be made obsolete by it. The likely future is a unified system where diverse execution environments—each optimized for specific use cases like DeFi, gaming, or privacy—coexist. They will share a common foundation of security, liquidity, and verifiable state, seamlessly connected to restore a cohesive user experience. The next phase for Ethereum is not just about scaling through separation, but about intelligently reintegrating what was separated back into a coherent whole.
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