It is in that it doesn't have censorship.

It isn't because the community is too monothematic and most content is about Bitcoin.

none is better than Threads

Depends. You're not going to be able to follow celebrations, organizations, or your IRL friends (unless you badger them about making an account). Might change if Nostr grows, or if Activity Pub grows (Nostr is bridged in to the fediverse).

Still a cool place to talk tech and other random topics, or experiment around with the tech. I've also found it to be full of nice people with less chaos than Twitter.

All really depends on what you're looking to get out of it.

No