Even if you can withdraw straight to L2s, the main problem I have with this scaling solution is it is too convoluted. I have no faith in being able to explain this to people who aren't already crypto enthusiasts. It seems much easier to explain how to use a single scalable L1 than to explain a cluster of ever growing L2s and sidechains. I know there is a lot of work in the ecosystem but really this has to be masked hard with a fantastic web wallet UI if it has any hopes of widescale and longterm adoption imo. This is why I have more hope currently for Solana than Ethereum.