I can't speak to the others, but I have very little faith in modern car computers lasting that long. They have become so complex, gaining additional sensors and

I can't speak to the others, but I have very little faith in modern car computers lasting that long. They have become so complex, gaining additional sensors and controls for improved safety and efficiency (great!) and requiring special programming tools at the dealership to update software or install some replacement parts (not so great!). If the company goes under or can no longer support an aging car computer system, a single part failure could limit the functionality of the vehicle. (SAAB TechII, cars with 2G/3G modems, etc.) On the other hand, if you're talking about older ECUs and related systems before the rise of the connected digital dash, you're probably right. The one in my car is 40 years old, and it seems to be built to last at least 50 if the rest of the car can hold on that long.