What a weird comparison. Some people do that to annoy Musk fans, others do it because the original name for something is often preferred to a meaningless rebrand - much as everyone still refers to Alphabet corp as Google.
It's not weird at all. Twitter isn't just symbolically dead, it's literally gone. If you still use it or even refer to it as a euphemism for X, you're promoting an alt-right radicalization platform intended to farm hatred. There's not really a middle ground here, advertisers will tell you.
Similarly - there are still people looking at the Digital Service expecting great results and deferred gains. They don't understand that this effort has been damned since the starting gun was fired.