I don’t like the touchscreen on my car radio. Actually I think it’s a step back in automotive safety. Now I have to take my eyes off the road to see if I am pressing on the correct area on the screen. With knobs and buttons, I could just feel where my fingers needed to be to work the controls.
I don't like it on my iPad, and I love my iPad. And I hate it on any sort of security input system. Try putting in a string of 8-12 letters/numbers/symbols correctly on a touchscreen. Odds of an error on any touch is 1 in 10, so the odds of an error approach or exceed 100%.