I found this post from Nostr. I find it a saner alternative to fediverse, particularly because the identity is just a server-free public-private key pair

But I don't know when if ever we will have a significant mass there.

Hacker News 100 on Nostr: https://njump.to/nprofile1qqsfexztjz4sq05j972pv5h3s9w0gaqvay...