This is a big part of it for me. With 'driver assist' systems that intervene when you're driving now being mandatory for all new vehicles sold in my country, I don't want anything newer than 2024. Practically , probably nothing newer than around 2020. You can disable driver assist, but for most modern vehicles, you need to do so every time you start the car. Insurance will eventually be used as a hammer to force compliance on this. Removing safety equipment that came with the vehicle already makes a car unroadworthy, so that's not an option either.

I'll be driving my old cars to the bitter end.