Earlier quoted context omitted.
The benefit of buttons isn't in the response time, it's in the tactile feedback that makes it so you don't need 16ms response time. I heard it click, I felt it click, it clicked. If the thing I wanted to happen doesn't, it's because it's broken and not because I can't tell if I clicked the right spot on my iPad. Not having to take your eyes off the road in these cases is the benefit of buttons, and no improvement to…
This isn't how tactile buttons in modern cars work. You're doing the same thing as pushing keys on a keyboard. The software can still be slow. Turn the physical volume dial on a car with a slow Apple CarPlay interface and tell me how that works out for you. Oh, it's too loud? But it takes 2 seconds for the software to respond due to lag and now you're fiddling with the volume button trying to not make it worse? A phy…
I know where the volume knob is and I can easily grab it and turn it without looking away. If it's slow to respond I can go again and dial it back down, without looking away. Or I can just keep my hand on the dial and spin it back a bit.
With a digital screen I can't leave my hand on it without continually pressing the input, and if I want to put the volume down I have to look and see where that button is.
A physical control absolutely fixes this