I also thought that about phone touchscreens. And although the extra screen real estate is useful for reading, I do miss the physical keys of the Blackberry. I could type so much more accurately (and therefore more quickly) on them.

Haven't tried a Tesla but I have tried the recent Porsche controls and I preferred the old ones to be honest. My experience with car controls is that the nearer the steering wheel (preferably on the wheel) the better and the more tactile the better.