CROSS-L2 ROADMAP IN ONE TWEET

Summary from the TLDR Crypto newsletter

Cross-L2 interoperability problems require considerable effort, but we should quickly achieve a seamless UX across Ethereum-based rollups. Work is being done on chain-specific addresses, cross-L2 sends using liquidity providers, L2 light clients, and replayable account state updates. In Phase 2 of the roadmap, shared key management and proof aggregation will further improve the experience.