[chucker]

I mean, the original iPhone kind of answered this: as Steve explained, a touch screen allows for more flexibility than physical buttons — and yet, the iPhone did ship with multiple physical buttons, for critical functionality: home, lock, volume up/down, silent switch. I'm sure there were internal arguments to have those be virtual as well (and indeed, one of them, the home button, eventually become virtual), and for multiple key functions, "no, we need this to be tactile and always in the same place" won out.

That's what cars that go all-in on touchscreens get wrong.