When I read about nostr I see code examples and cryptography charts.
When I read about Mastodon (fediverse) I just run docker-compose up and I'm in business. That is what made the fediverse breakthrough and nostr not.
It needs to be user friendly for both end users and sysadmins for it to catch on.
Also unrelated to all that, I'm kinda skeptical about any system that claims to be resistant to censorship because it will become a hotbed of racists and bigots online. On one hand certain parts of the fediverse take moderation too far, but on the other hand you can't have a platform with zero moderation. It would be chaos.