Nostr is still small, there's little engagement, you don't see all your notifications on every client, too many monomaniacal purists, libertarians, leftists, conspiracy theorists (of which I'm one), anons and retards. And yet it still has the energy of a "public square" to me. Twitter, I'm not sure what it's become. I post less and less there, not because I'm a purist or "it's fiat" or anything stupid like that. It's just feels dead, the energy is gone, there's no juice to it any more. I can't explain exactly what it is, there are still some good follows, interesting people, but the algo has killed the vitality somehow.