Of all Musk’s “companies” this makes least sense to me. xAI is at least in the AI space, X.com is a true tech company and Tesla is also closer to AI than SpaceX.
Guess SpaceX is the only one with the money “available”.
You're forgetting that xAI and X.com have both already been folded into SpaceX (First xAI acquired X.com, then xAI got acquired by SpaceX, both mergers were all-stock acquisitions so they were done with funny money). So when people say "SpaceX" now that does encompass both xAI and X.com as well. The reason Tesla wouldn't do this is because Tesla is a public company so it's more difficult for them to do insane shit without being sued.