Elon Musk believes that "machines that build the machines" are ultimately more important than whatever it is you're manufacturing. In his own work with Tesla and SpaceX, it's clear why Musk says this: He uses less expensive and more scalable processes to build the parts for spacecrafts and cars.
That weird Cybertruck we love to hate or hate to love? It looks like that because it would break the machines that make it, otherwise. Because it uses 30X cold-rolled steel, rather than stamped aluminum or steel, it's not possible to stamp this kind of material. So instead, it looks all boxy instead of curvy.
Read the full article here: https://www.popularmechanics.com/technology/robots/a30199330/robotic-blacksmithing-metamorphic-manufacturing/