I'd love to hear what the Bluesky team thinks of Nostr. It seems pretty damning to me that a founder of Bluesky is now talking up the latter.
Dorsey is certainly focused on that realm
There is no predicting what approaches will win, but those 3 are the current viable options I think.
FYI I am part of the crypto crowd myself, but I am a SWE looking at these systems, not a CT gambler, lol.
That alone gave me pause, as Twitter ended up as one of the most despicable platforms we have to suffer today (and yes, those issues are inherent in its nature, and long predate Musk buying it). But I guess that they might have learned from their mistakes this time ??