Just browsing for the first time. Seems pretty alive. Different crowd but not as bad as I would have thought after some comments here. That’s just my first impression though after a couple of minutes.
Discussion
Of course the comments here will be a little harsher than the reality is. It is a competing platform with a relatively similar approach and use case. Or to be precise Nostr is what Mastodon was supposed to be.
It's not that bad, the users (and even admins/mods) arent as horrible as often described (for the most part), but it does have inherent flaws.
I'm mostly on Mastodon these days. It's great. The only real problem is too much censorship from server operators.