What Musk needs to do is fund smart people to do interesting stuff and then get out of the way. If that's what this is, great. If it's just another opportunity for him to do something high-profile and half-baked to massage his weirdly fragile ego: Ugh.
So, OpenAI? The problem is always that his ego gets in the way. He wants to be recognized as the messianic figure behind AI, but the ship is sailing ahead without him. Hence all the new efforts (Tesla AI robot, XAI) and grandiose promises ("understanding the nature of the universe").