All cool stuff for developers, I am sure.

The economist's perspective is different, especially as OP includes merchants and shops. It is becoming quite clear that Bitcoin is stuck on (minimal) first order merchant level adoption which is reported to be regressing in El Salvador.

I think of Lightning network as a key part of what should become the abstract wholesale money layer of Bitcoin. Its key function will be to ensure verifiable honesty of the retail money layer nodes which will also handle privacy (for fungibility and censorship resistance).

These are very different requirements.