Twitter also doesn't need users to fulfil Musk's goal of destroying a key factor in many (all?) people-powered movements. Occupy Wall Street, Arab Spring, BLM.
And I'm sure that's a factor in why people like Larry Ellison and Saudi princes stumped up some of the money.
The problem is that the media still uses X in it's reporting, and people still use and link to it. If we just stopped using X and stripped it of any legitimacy, it would fall off pretty quickly.