I'm not going to delete my X account, because I don't want the username reassigned. But I'm deleting all my follows and am starting to work on deleting posts. Turns out you can only unboost a post if you block the user, so a lot of y'all are going to be blocked. Don't take it personally. If anything, that's the kind of misinformation that makes X's data mining less useful.
@AlphaCentauri @th3j35t3r had a guide on how to delete all your shit, but keep your username.
If you send him a message, I'm sure he would be more than happy to tell you how to do it.
I'm a little hesitant to do that, because the one I have has no identifying information besides an email I don't use for anything else. It was locked for a long time because I wouldn't give them a phone number. It got accidentally unlocked when Musk took over. They might require a phone number halfway through this process.