Particular in the context of car sharing (ShareNow, Miles, WeShare, etc.). Because you need to do the crappy touchscreen thingy every time you enter a vehicle.
You drive different models from different vendors all the time. Everything is slightly different. The IVI system has commonly incomprehensible UX with deep menus.
It mostly feels designed by committee (which it is, I worked on one such system for the flagship modes of one of the top German car makers a few years ago and good deep insight into the process).
Physical, standardized buttons would go a long way.
If you buy a car you'll have an initial learniung curve and while it sucks you can cope.
As a occasional user, you're in a world of pain. I don't understand why vendors do not do IVI firmware that is tailored for the car sharing/car renting market.
It needs two buttons after booting up (and they can be on a touch screen even):
1. Connect phone (Android Auto/Apple CarPlay)
2. Connect Bluetooth
That's it. Many cars still do not offer the former at all. Either way, the latter or both options are commonly hidden deep in nested menus in the IVI's preferences.
Early on, there were attempts. For example, car2go (now ShareNow) which was owned by Daimler, had a function, ca. 2014/2015, where it would remember the radio statio based on who was using the car.
I.e. the IVI firmware of the Smart car (they only had Smarts then) was somehow integrated with the car sharing app/user profile. And it was location based. Driving car2go in Milan, Italy the cars recalled my fav. radio station there but when I was coming back to Berlin, the station I had set using a car there was automatically on.
And then the next generation of Smarts was rolled out and the feature was not only gone, the firmware the cars had was just stock standard. I.e. they didn't add something like the bluetooth shortcut I mentioned above which I had expected and deprecated the feature the previous model had.
It's almost a decade later and nothing has improved -- rather the opposite.