It's very interesting to see #infosec and cybersec communities choose Mastodon/Bluesky over Nostr. Even #ScienceTwitter and #AcademiaTwitter are reestablishing them on Bluesky.
Sane people don't like basking in a cesspool of disinformation and hate. It makes sense to me that all these people and organizations are fleeing to other platforms. I don't think it's about moving to Bluesky so much as it's about getting away from Twitter.