I suspect this is going to be a Cybertruck/Boring Company situation, where we may get something ostensibly called the same and may even do something one could consider similar when squinting (maybe a bit higher than U9 jumps in scope) but with the specs and implementation differing so greatly that it shouldn't be considered the same. Exoskeleton vs body panels, 200kph+ on electric sleds vs Teslas (driven by human operators; tells you how much they trust their FSD tech) in a tiny tunnel, FSD on HW3 vs an upgrade maybe someday, etc.
And inevitably two groups will clash, one pointing out how much this deviated from the original, often decade long promises vs another pointing at the identical naming, how it's still a product they like and of course the all time winner "I don't see you do X"...
For what it's worth, I'd file this as a RCS demo for SpaceXGrokSI (or whatever they call themselves this week) above all else and if I were a betting man, might be a prelude to fusing them into SpaceXSuperXTeslaXIntelligenceX...
I'm still baffled by the human drivers for those tunnel runs. I can't imagine a more controlled environment where self driving should be capable.