I think something like mastodon could be like that with a group of friends, but most people don't seem to want to keep up with that kind of decentralized platform. Lol we certainly don't need blockchain though. That literally brings nothing to the table and unnecessarily complicates it. I think people just keep adding and adding anything and everything to Instagram and Facebook, and it just turns into an amorphous fatberg. I pared both down a lot to more or less my top 50 friends/family/groups and it's a lot more useful, sorting by "most recent" doesn't turn up bunch of junk and defeats the facebook algorithm.