On Friday, when SpaceX filed plans with the FCC for a million-satellite data center network, you might have thought Elon Musk was having a bit of fun with us. But a week later, it is clear that he is dead serious. The most obvious step, of course, is the formal merger between SpaceX and xAI that went forward on Monday, officially drawing together Musk’s space and AI ventures in a way that makes a lot more sense if there’s some kind of joint infrastructure project planned. But even beyond the mer