Nostr
There are many problems with Mastodon, mostly due to the fact that it doesn't rely on any cryptography. Because it cannot do the multi-master approach of Nostr due to lack of cryptography, identities are assumed to be "owned" by the server, which is fully trusted by its tenants. Mastodon server owners can do all the harm centralized platforms can do to their underlings, which are completely helpless in case of misbehavior or even in the normal case where a server owner loses their server or deci