Ethereum is also layered. ZK Rollups are later two and not related to the Ethereum devs. It's an isolated engineering later with lots of experimentation going o

Ethereum is also layered. ZK Rollups are later two and not related to the Ethereum devs. It's an isolated engineering later with lots of experimentation going on with optimistic rollups, ZK Rollups, state channels etc. The problem with Bitcoin is that it's not technically sophisticated enough to support proper L2s which results in poorly engineered solutions like Lightning and centralized solutions like Liquid. With Bitcoin more work needs to be done on L1 for the ecosystem to support layers above it while Ethereum could freeze development forever and still support flexible, fast, and decentralized layers on top.