You could argue that’s because of familiarity. Obviously I like a lot about my car or I wouldn’t have kept it for this long! But truly, it’s not that I don’t think there’s room for improvement on my old car. There have been plenty of advances since its time that I would welcome if I bought a new vehicle: improved efficiency, safety features, practicalities like better external lighting, and so on.¹

For me, those benefits always seem to be outweighed by the horrible state of controls and displays and “infotainment” systems in new cars. They’re cluttered and intrusive and distracting. I’m not sure which is worse, touchscreens that take your eyes off the road, or cluttering the steering wheel with controls for a phone that it is almost never appropriate to be using while driving anyway in my country. Meanwhile, apparently I still have to take a hand off the wheel for a second or two to change gear or switch on various external safety lights. This should have been some sort of meme punchline, not real life.

Between poorly designed controls, the security and privacy problems that seem to be rampant in modern cars, and the sense that EVs might be the future but there are still some big unanswered questions, I expect it will be a few more years before I change to a new vehicle unless some practical consideration forces the issue first.

¹ I’m still waiting for the windscreen that automatically enhances the driver’s full view in low light or poor weather conditions and subtly highlights the required driving line through junctions as directed by the navigation system, but I reckon we’ll have that too before the self-driving flying cars are here.

The RAV4 we had for 4 years now - I'm thoroughly familiar with the UI, and parts of it are still completely non-sensible.

Like yourself, before COVID I traveled and rented cars frequently; there are some UI choices that are inherently poor or against my priorities/workflows and they'll never be right. I could list them, but now we'd be into rant territory... :-/