Comment by krapp

I don't think anyone liked that necessarily, not having to deal with multiple logins is one reason decentralized social media and social logins took off.

Having identities tied to a domain and an instance is one of the biggest flaws with the fediverse IMO.

I'd much prefer something like Solid or Nostr where your identity is owned by you and described by a single file. Maybe involving PGP keys or some kind of cryptographic hash, although that might be too much of a barrier to be viable. It's a hard problem and the way the fediverse handles it is awkward at best.