I think that's a typo for "any of the 34235 clients", where 34235 is a stand-in for "large number" (there are lots of nostr clients).

Nostr is interesting because it's not actually P2P, just decentralised - whether that's a good thing is open to question.

In this case 34235 client refers to `kind 34235` events. In nostr, different event types are distinguished by kind numbers, so clients can be built and filter for events of a certain type. For example, the content shown on a twitter/microblogging client, should not be the same as the content shown on a YouTube like client.

That's super usable!

It's better if you think Nostr is superior to ActivityPub.