Didn’t he ban several journalists that reported on him banning Elonjet something he said he’d never do, amongst other things. That doesn’t fit in with free speech absolutism or free speech, so I am a little skeptical when he uses that term. You can only judge people by their past actions.
I am not too familiar with Nostr. I think Jack Dorsey endorseyed it. Hopefully there is enough to counter balance the exploding heads. I am massively in favour of free speech, but I don’t like how that is often used as an excuse to freely useoffensives slurs.