Even if everyone is on bsky.social, that's still a huge improvement on the status quo. It's not like the web isn't decentralised just because lots of people are on AWS - you can move away at any moment, adversarially if necessary.
Looking forward to the future where an app just sort of silently backs up your PDS/keys on your device until the day you need it and everyone finds out they can log into whatever platform replaces the one that blew up like nothing happened.
