

Revolt relies on community self hosting last I looked at it, which means it would never be a “mass” solution.
Should Discord ever collapse (something I don’t see in the near future), the free alternatives that I see benefitting would be XMPP and Matrix — though there’s new contenders that could make name for themselves by then too.
I expect the trusted authorities would be selected by the server where the user account resides. I.e. if a server’s admin does not recognize a certain authority, it would not show their verifications to users logged in to their server.
It’s possible that it could extend to user selections of trusted verifiers as well, but I think implementing that level of granularity would be more of pain than it’s worth to Bluesky. Still, I could be surprised.