With Musk you know what you get.
The major issue is that actually that you do not. At all.
He is a man known for unpredictable behaviour, emotional outbursts and pretty much self-admitted drug use (of a variety of drugs as well as less meaningful weed, though his predilection for using the latter in public even where it will attract consequences indicates a certain cavalier attitude). He was forced to spend $44bn because he's prone to outbursts, and given that $44bn investment has declined in value (it was never worth more than $30-something bn, and now it's worth south of $9bn and dropping fast), it may be the most expensive emotional outburst in history.
Further, Musk is a total "nerd tourist". I don't say that to gatekeep, because it's fine to be a nerd tourist, but rather as a statement of fact. Why does that matter? Because he doesn't know anything significant about D&D. So what he would choose to do with it is entirely unclear. He could do essentially nothing - like basically re-publish 5E with the only major change being that he'd changed all the art out for edgelord stuff and made the text edgier (you know he'd be ultra-"triggered" by stuff like the diverse/positive portrayals of D&D races). Or at the other end of the spectrum he could stop publishing 5E, and turn D&D into basically RAHOWA, replete with terrible idiotic rules, incompetently-designed rules he thought was cool. You have to remember this is a guy who claimed to be one of the world's top Elden Ring players, and then showed off a build so painfully incompetent that it was clear he didn't even understand the basic mechanics of the game. Like your average 13-year-old Elden Ring player is doing a better job than him. I think the most likely scenario is that he'd hand D&D over to some kind of orbiter/reply guy of his who is an edgelord-y OSR type, or maybe someone like or even exactly Justin LaNasa, but we can't predict who that would be.
So no, you don't know what you're getting. Because you're dealing a very emotional, capricious and aggressively drug-using man who doesn't know anything about D&D.
The only good thing is, it's very unlikely anyone would lend him any money to buy Hasbro. As others have pointed out, Hasbro has a ton of bad debt, and on top of that, no lender would expect Musk to increase Hasbro's value. So to buy Hasbro, he'd have to liquidate assets and spend his own money - which he absolutely could do, but hates to do. So it seems like this is his usual smack-talk.
