David Cameron was guilty of over-estimating the British public. The Brexit vote was intended to put an end to the anti-EU contingent in the conservative party, he never expected that it had any hope of passing.
Modesetting work was done in 2022, but for some reason no one had released a new stable release of the Xserver with this patch included since then. This was one of the reasons Xlibre was created, there was all these improvements to Xorg sitting ready for release but never being released.
Spacex has no existing customer to satisfy their future launch ambitions with Starship, hence data centers in space, just like they did with starlink to provide the necessary demand for Falcon 9. The launch business is not profitable without a regular cadence, too many fixed costs - ground infrastructure and personnel.
X can supply training data to to Xai and Grok is heavily integrated into X so there is some synergy there.