Well, he did not say that building cars is harder than building rockets, but that "building the machine that builds the machine" is more difficult. As in: eff

Well, he did not say that building cars is harder than building rockets, but that "building the machine that builds the machine" is more difficult. As in: efficient, large volume manufacturing and supply chain management. But that's obviously a very different kind of challenge. He said the same thing about the new SpaceX rocket, Starship, which is supposed to be produced in large volumes.