Maybe Elon should visit Europe or Asia and check out an underground mass rapid transit system or two. They have two orders of magnitude larger capacity. And even their capacity is finite. And keep in mind that the NYC Subway and the London Underground are NOT a good example of a modern mass transit system.
I've noticed that Elon Musk's projects often start off in the wrong direction, but evolve in a way that works ultimately. And that's what matters. For instance, SpaceX originally insisted on parachute recovery of their Falcon 1 and Falcon 9 rockets. They tried, and it didn't work. But they switched to powered landing as some others had demonstrated (DC-X and Masten Space Systems and Armadillo Aerospace), and they mas…
With butt loads of public money?