I have a Cadillac XTS, and it is a 100% touch interface. I cannot do anything with the radio/climate without taking my eyes off the road. I absolutely hate it. It doesn't respond well in the hot Texas summers, and requires more effort to operate than even the cheapest in-dash car UI. Contrast to my friend's Audi, which I can do most things with the center mounted dial without looking, just by memorizing how the console feels.
To belabour an obvious point: when you are driving a car it is vitally important that you keep your eyes on the road. When you are operating a mobile device, much less so. So hardware controls are far more useful in a car than they are on a phone. Touchscreen keyboards on phones are a trade-off - what you lose in tactile feedback, you make up on valuable screen real estate. That logic doesn't apply to cars either.
They also said SD card are going away, that hasnt worked out so well. Neither has the headphone jack for audiophiles.
If anyone at Apple reads this comment, for the love of god fix your cords. Fake Chinese dongle/cords are better than the ones you guys make which is atrocious from a company that brands itself as high quality.
Here are your macbook pro power charger reviews of which 152 out of 170 reviews are 1/5 mostly because they are so fragile they break: https://www.apple.com/shop/product/MD565LL/A/apple-60w-magsa...
Here are your iphone jack to headphone jack reviews of which 376 out of 479 are 1/5 mostly due to breaking: https://www.apple.com/shop/reviews/MMX62AM/A/lightning-to-35...
Tactile controls facilitate use without having to look at them, so you can keep your eyes on the road where they belong.