This is not true. We just got a new independent audit of Matrix’s e2ee (due to be released in a few weeks), and has a tonne of clients with new ones popping up

This is not true. We just got a new independent audit of Matrix’s e2ee (due to be released in a few weeks), and has a tonne of clients with new ones popping up every week. They all have different UX, but some are very simple - both in terms of auditable code, and in terms of UX. Not all the clients are a drop in replacement for keybase, but some of them certainly are on the right track.