Let's put it this way:

Nostr is the only one of these "decentralized, open protocols" that is truly decentralized and open. Even the protocol spec itself, is completely open. I see no value in half-assing a communications revolution, so I can't even be bothered with the others. If this isn't successful, then damn it all. 😂

I guess that's a sort of optimism, yes. This is the only one crazy enough to actually work.