[supertestnet]

I think p2p techniques are distinguished by being "serverless," that is, you don't publish content to someone else's device, you host your content on your own device and people have to connect to your device to get your content. Peers talk directly to other peers. In nostr and other client/server models like mastodon, you publish content on someone else's server and if you go offline people can still access it.

The difference with nostr is lots of redundancy -- you post your content to like 5 servers so that if one goes down you're not really censored, people still get your content and -- in your list of relays -- you replace the censorious one and then your followers update where they follow you at.