Summary
Rollups have improved Ethereum scalability but have led to fragmentation. Shared sequencing can help users have a unified experience across rollups.
Key Points
1. Rollups have provided horizontal scalability and a variety of execution environments to the Ethereum ecosystem.
2. However, this has led to fragmentation as apps on different rollups lack shared liquidity and interoperability compared to apps on the Ethereum L1.
3. Shared sequencing among rollup users can help recreate the experience of being on a single Ethereum chain.