Big cities don’t function without transit, and that means transit has to be allowed to succeed. That means it won’t go to your door, or protect you from the company of strangers. You don’t have to use it, or like it, but if you live in a city, you depend on its ability to attract huge numbers of people while using little space, so that there’s enough room for everyone.
— Jarrett Walker: Elon Musk doesn’t understand why mass transit succeeds