I haven't tried Nostr, so have no opinions on what the experience of actually using it is like, but cryptographic identity seems like it'd be a better way (technically speaking) of doing things than AP; tying everything to domain names has worked rather poorly -- as we've seen repeatedly every time an instance goes offline...

I ended up on AP after jumping ship from reddit. I was on kbin first (since it was readable w/o JS and I liked the UI), and then later using the mlmym interface for lemmy as kbin because more unstable and eventually went offline.