The A/C on both vehicles is 100% physical controls, no touch screen required, in fact I've yet to see an A/C option on any of the touch screen menus.
Yes, the radio is mostly configured via the touch screen, but skipping stations / tracks and volume are controllable via controls on the steering wheel and a physical volume knob on the dash. We don't have carplay yet, but I think it is in the US, this might make my moot, but my main complaint is that it can be quite delayed in starting to play my itunes. I suspect this is because my phone is the secondary audio device (I usually let my wife pick/control the music), but thats a minor annoyance at most.
Edit: 6.3l/100km 37.3mpg on Hilly -> Urban commute in an SUV :)
Apparently this was actually changed in an early software update to the TM3, and cruise initially was engaged via the screen though!
https://interestingengineering.com/tesla-moves-autopilot-con...
You can use the screen as described, but it is much quicker to roll the right steering wheel button up/down to adjust TACC speed. You can also push it left/right to adjust follow distance.
I rarely touch the screen while driving my Model 3 (or while my Model 3 is driving me).
And maybe part of it is me being set in my old man ways, but I don't want a touch screen for any of that. Probably the only 2 things I can see being useful on that screen are the reverse camera and GPS that talks to you and you can glance at it occasionally.
Anything else should have real controls.