I am unlikely to go back whilst Musk is running it. I want nothing to do with him.
Mastodon is nice, but it will lack some of the features. I'd like to see the Hive microblogging options improve. InLeo can do short videos now, but that and Waves are limited..
I think threads and waves not being individual posts is what puts me off. I like how a buzz on @dbuzz shows up on my "All Posts" tab. In that way, the body of content I create can be seen in one place. Which I find helpful and sometimes is a fun walk down memory lane.