P2P tends not to work very well, and is going on (and mainly failing) in a few different places. Coinjoin is a red flag for the feds, so devs dont really want to risk it. Maybe some will, tho. Fees wont add up to much I expect, and mixing can be done in many other places. I think AI integration will be a good match for nostr. Combine that with games too. Lots of viral paths for social games.