**Ethereum's Layer-2 Evolution: The Promise of Based Rollups**

Ethereum's layer-2 (L2) solutions have eased congestion and high gas fees but created isolated ecosystems. Each L2 operates independently, leading to fragmented liquidity and user challenges. Enter "based rollups," a proposed solution aiming to restore interoperability by shifting transaction sequencing back to Ethereum's mainnet. This approach promises cheaper, faster transactions while enhancing network security and cohesion.

However, convincing existing L2s to adopt based rollups is challenging due to potential revenue loss. Despite this, proponents argue that based rollups could unify Ethereum's ecosystem, offering a seamless experience akin to Ethereum's original vision.