All of this and repairability. Given enough time, I could repair everything on my car. Newer cars throw up as many barriers to that as possible.
Hopefully you won’t run into the problem I had with my older car- parts availability. It’s only going to get worse as cars get older. Especially with the electronics.
The oldest car I’ve dailied was a Honda CRX that was just shy of 20 years old when I sold it. Supply was getting sparse on the ground, but I could get even some rare, single-model-year, variant-specific parts from the dealership parts counter until right around the end of my ownership.
Currently I’m driving a 17-year-old Fit and honestly, I’m not too worried. Even if I can’t get something new, it’s right about in the sweet spot for junkyard availability.