If i'd be using those raised markers I wouldn't take so much time to adapt I think?
The top set of buttons arranged in a line are much worse. They're two sets of 4 in a sense, but they're nearly undifferentiated from the hazard lights button, so in reality it's one long strip. I strongly suspect that people will take their eyes off the road to look at those buttons more often than not.
(Yes they're media controls, but let's be honest: people will use them to skip tracks while driving.)
Buttons in car control panels require users to leave the default position of hands-on-wheel and acquire the new button. That’s an expensive operation, and it’s well-studied — https://en.wikipedia.org/wiki/Fitts%27s_law
Also, keyboard layouts are static — learn QWERTY once, use it forever. Car control panels are usually different between cars, so learnability is harder. Many people regularly drive multiple cars, increasing difficulty again.
This is over blown. You only have to learn your car's radio once per car.
Or you could learn Dvorak and switch between the two.