Zuck sucks but I almost never even hear something about or from that guy. Musk on the other hand is in my opinion a ticking bomb especially with his cult following which Zuck doesn't have. Musk is able to do a lot of harm to anything and tens of millions would support him whatever he does. Maybe I'm paranoid but I think Musk is one of the biggest narcissists ever and with his following that can't be good.
I've got a Threads app over an APK because it's not yet available in the EU for regulatory reasons (especially changes in the EU yet to come)