I feel very strongly about calling Elon Musk's social media platform "X" because I want to remind people that Twitter is gone -- it's dead. And we know who killed it. We need to acknowledge the power that one edgelord billionaire has over our public sphere, and remind ourselves that we cannot reclaim that space. We can't make it "ours" again by calling it Twitter. I'd rather build up new spaces online than chase after the memory of one that is lost.
@annaleen pretty much with you on this. I do separate it out depending on whether it's pre EM or post. If I'm referring to the past, it's often "Twitter-that-was" but anything now, it's X, rather because I feel its insulting to refer to the old version by the new name, and the new name is simply an insult now. (It's a lot longer to write this than think it...)
But firstly, I try not to refer to the new one at all, and the old one sparingly.