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.
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).