After some quick mental accounting, 9 of my last 11 vehicles (cars/trucks/vans/motorcycles) were over 10 years old when I bought them. One of the remaining was 7 years old at purchase. My current vehicles are 7 and 26 years old. I also realize yours and my car preferences are not representative of the general public.

I’ve worked as a controls engineer at an automotive assembly plant side-by-side with quality engineers. I’ve also worked as a reliability engineer.

Methinks you make too many assumptions :-)