The Ethereum Foundation has published a document outlining its vision for L1 and L2 collaboration and clarifying the roles and responsibilities of each layer.

The Ethereum Foundation outlines the collaborative relationship and respective roles of Ethereum's L1 and L2 blockchains. The article points out that L2's primary goal has shifted from scaling Ethereum to providing differentiated functionality, customized services, and independent market strategies, while L1 should continue to scale as a permissionless hub for global settlement, shared state, liquidity, and DeFi, without sacrificing core attributes such as censorship resistance, open source, privacy, and security. The article suggests that L2, seeking the closest integration with L1, should advance synchronous composability, full interoperability, shared liquidity, and Stage 2 validation, and explore native Rollup mechanisms. L2 should at least reach Stage 1 and pass a "walkaway" test to ensure users can safely exit to L1 even in the presence of malicious actors. The Ethereum Foundation states it will continue to expand L1 and blob capacity, advance native Rollup technology development, improve L1 liquidity and L2 liquidity access, collaborate with organizations like L2Beat to monitor L2 security attributes, and establish a Platform team led by Josh Rudolf to improve the overall Ethereum platform experience.