RE:Threads:
Even if I trusted Meta further than I could throw a life-size Trypticon, I won't touch anything that is app-only if I have any choice at all. Not only are mobile apps usually just glorified webpages(in which case why can't I use a browser?), but because of how they're set up they usually try to suck up data like Unicron at an all-you-can-eat planet buffet. And as far as its fediverse connections, most servers I've heard about outside mastodon.social are pre-emptively restricting or blocking it for the same reasons. And that's BEFORE getting into the whole algo-only and whatnot that's already been brought up.
Oh, and if you do set up Threads, you can't delete it wihtout deleting the associated Instagram account too. And I don't know how many here actually care, but because it's tied to Insta, it also means NSFW content is not allowed, so at that point, why not just swing over to tumblr, if you need something centralized?