Are L2s Ethereum?

Ethereum and its L2s are presented as a symbiotic whole rather than a zero-sum contest, and the article argues that L2s enhance the utility of Ethereum and ETH. L2s rely on ETH as currency, store data on Ethereum, and settle there, and the article says the proliferation of L2s is a success of the rollup-centric roadmap. It also warns of fragmentation from too many copycat L2s with little differentiation, and names Superchain, AggLayer, Elastic Chain and Orbit Chains as initiatives aimed at seamless connectivity.