Are you able to perform a good majority of functions without taking your eyes off the road over 95% of the time? In my perfect setup I would have configurable buttons to map critical functions to and then a touch screen for non-important things. I have a very hard time seeing how a touch screen alone would be better than touch screen + a couple buttons.
Yes. Everything you need while driving is on the wheel or at a well defined corner of the screen (which big touch targets). And that too can be avoided if you’re willing to use voice control.
