The biggest winners in the SpaceX-xAI merger might be the original Twitter shareholders, while SpaceX shareholders might be the losers. The head of both xAI and SpaceX, as well as Tesla Elon Musk, shocked the investment world Monday when he announced that SpaceX had acquired xAI, creating what he called “the most ambitious, vertically-integrated innovation engine on (and off) Earth.” SpaceX can put things in space at a rate unmatched in human history, so essentially it became an AI juggernaut overnight.