People are going to nit-pic and while some of the concerns have some weight to them, so far they are trivial IMHO The fact is we need an alternative to X because the current owner has done and will continue to do terrible things not just to the service but apparently on a personal and political level that is beyond distasteful to a HUGE chunk of the users (if not even greater than 50%) And Threads isn't going to cut…
And the biggest issue with Xitter still isn't Elon Musk (have you forgotten the "Trump years" already ?), but because the way how that media works is turning discussions into flamewars, and its users into morons (including Musk, who reportedly was hooked on it long before he bought it). It's especially concerning when journalists (who really should know better) and politicians use it.
That blame lies very much on Twitter's founders.