Just because the delivery mechanism is 1-to-1 doesn't mean it is impossible to be 1 to many.

But, if you are interested in reality whatsoever, you have to acknowledge that many-to-many is an intractable problem and anyone says otherwise wither dishonest or didn't care to think it through.

Nostr itself started with this realisation (watching p2p systems) and relays are intended to be a layer with fewer nodes so that data can converge before diverging.

You can call that sufficiently decentralised, but it is not any different from Bluesky claiming that there can be tens of relays. Nostr didn't yet show how is there going to be tens of relays offering that global view to everyone when "everyone" means 100s of millions.

so my point stands, global discoverability is impossible to make decentralised, the best you can do is give up on either decentralisation or global view.

If you give up on global view, then you are just talking about rooms, you call them relays, but they are just big rooms.

This is not a criticism of Nostr or Bluesky, it is just an attempt of breaking the deliberate tendency to ignore physics when talking about global discovery... people just decide that the impossible is possible and refuse to engage with reality ... not good.