Elon Musk thinks it’s a “good idea” to create a holding company above Tesla, SpaceX, Neuralink, and The Boring Company — at least, that’s what the billionaire CEO said in response to the idea on Twitter. Such a holding company could be simply known as “X,” longtime Tesla shareholder Dave Lee suggested, in a nod to Musk’s ownership of “X.com” from his PayPal days.
Musk notoriously entertains changes, big and small, to his companies in Twitter’s public square. In 2018 he even suggested one so large (and largely baseless) — taking Tesla private using “funding secured” from Saudi Arabia — that he wound up in court.
But the idea here isn’t so far outside the realm of...