The output is hard to square with idleness. The same person simultaneously leads Tesla, SpaceX, xAI, Neuralink, The Boring Company and X — companies that in recent years landed and re-flew rockets hundreds of times, built the best-selling car on Earth, stood up a 100,000-GPU supercomputer in 122 days, and put a brain implant in 21 people. Colleagues across his companies describe punishing hours, deep technical involvement and a habit of sleeping at factories during crunch periods. Being highly active on X is real and consumes time — that's a fair critique of focus. But the notion that someone running this many simultaneously advancing hard-tech companies "doesn't work" isn't consistent with what those companies actually ship.