I think you then run into the siloed, not decentralized issue. If I recall a post you made while back about removing Damus relay and not being able to see a bunch of people's posts was my inspiration to build nostr:npub16fcy8ynknssdv7s487nh4p2h4vr3aun64lpfea45d7h4sts9jheqevshgh since Damus relay is one server (literally).