Lots of them, as they're probably local ones, for private use.
Probably multiple times as many relays in active use as nostr.watch displays. Most people don't register them.
Nostr.watch actively finds and lists them. Do you have an example of a relay that isn't listed? Would be cool relays published some usage stats for scrapers like nostr.watch to gather...
Some relays are only ws://local, for instance.
True.. Does wss://local help with responsiveness? I should probably set up one of those. My bostr2 bouncer is unresponsive sometimes because it's on a cheap VPS. Any recommendations for setting local relays?