the great thing about nostr is that we are not bound to the notion of a global network. not many clients respect the idea of restricting the relays that are searched for events to enable an isolated subnet to be used, but it can be done, and unlike the consensus-based global-focused designs of protocols like mastodon and bluesky, nostr doesn't prescribe or even have any kinds of strong consensus algorithms so it is quite easy to do.

the result is that nostr can become a plurality instead of a monolithic global, if people just pull their fingers out and get building client logic for it