Hard buttons pretty much a hard requirement for me on a car. Thankfully they still exist and will probably continue to exist. The trend towards touchscreen everything is already starting to reverse.
personal experience, own a TM3, I rarely if ever need to use the screen. Not even for navigation. Some simple actions are almost automatic for me when I do want to toggle, muscle memory even works then.
with regards to touch screens vs physical buttons, I tell friends at work who have mocked the TM3 display. put a sticker on every button then remove them as you use them on a drive.
plus some cars put buttons in far worse places but as with most cars you adapt real quick. after all its not that you need more than a few buttons from the dash
I think by this point most center console displays are touch-enabled. That doesn't necessarily mean there's much besides drive computer data and radio controls in them, although bigger screens and less physical inputs is certainly where they are heading, for better and for worse.
I don't find this diverse touch screen statistic all that interesting; it would be far more interesting to know how many of them don't have certain traditional physical inputs, e.g. for climate control.
There is nothing I prefer more in a car than the classic 3 physical knob layout for heat/cold, vent/selector and music.
I feel every car should start with that, and maybe add a touchscreen only for deeper interactions, usually needed when the vehicle is not in motion.