It's interesting to consider what other types of L2s might look like, and how different tradeoffs would produce different architectures w/ different consequences. At some point, "layers" and "institutions" start to blur together -- in a way, a bank is a layer, where transactions between bank customers update its internal ledger but don't produce final settlement -- a kind of scaling.

Some of these instutions/layers are starting to pop up in btc w/ Fedimint, Liquid, etc. I think that these will be really crucial in the end, and the ultimate means by which most people interact w/ btc.