Aren't relays already a thing? I remember using one back in 2017, but don't use one anymore because you basically had the choice between private relays that just existed to connect up 3 or 4 instances or public relays.

Public relays were really the most authentic way to get the "true" interconnected experience: just a constant deluge of assholes dumping shit nobody actually wanted to look at, which is why I abandoned using them; you'd basically given yourself a secondary job to get rid of jackasses. (Which wasn't worth it on a single-user instance; I'd rather accept the low discovery and just rely on a slowly building graph instead.)

I don't really see any replacement fix those problems; relay quality was always reliant on the operators of the relays after all.