nobody on Nostr: I have thought that a possible end state of nostr is that there will be some small ...

I have thought that a possible end state of nostr is that there will be some small relays and some large ones. In theory you would have participants who never, in their lifetime, are aware of other groups. Except for a few black sheep who are curious about other groups maybe.

This is part of the beauty of NOSTR, is that it mimics the natural organization of peoples and cultures. It empowers groups to be what they are, with their own norms and taboos.