I have thee theories, any of which could be true independently of each other. From a long-term perspective it seems obvious to me that Musk is aligned with some kind of progress-friendly coalition, and that this is part of a greater pattern of sabre - rattling between Elon's faction and a more conservative rival which many of the legacy media outlets belong to. On a smaller scale, it could be that the labour and automation issues are pretty well sorted and he's baiting shorts. Finally, it could be that since he's entered a new romantic relationship recently, he's simply undergoing a personality change and more easily combative.