The planned obsolecence of the 50s and 60's meant that the life of any car was no more than 10 years.
Most people bought new every three years and traded in the now rusty last car. That car was bought one or more times by folks that couldn't afford new ones. At 10 years of age in any of the rust belt states a car was ready for the crusher.
I have bought 3 year old cars that every nut had to be cut off with a torch because of the rust.
Holes in fenders were common one two and 3 year old cars.
If you didn't have it aftermarket rustproofed Some would rust thru in a single winter.
My grandfather bought a new car every year. He refused to drive something that might show rust at any moment. A single bubble under the paint was enough to make him trade early.
AMC was better than the rest and you could drive their cars for 4 or 5 years--so they sold less and went out of business.
Unfortunately that business model continued after the Japanese showed up.
The whole point in this is that if you don't want to spend your later years (40s and 50s) waiting tables for foreign manufacturers reps on their expense accounts it is up to your generation to fight this.
Mine generation is done and going.
The ones running the place now can't see past the next stockholders meeting.
The up and coming 30 year olds seem to see personal Greed as the means to the desired end result.
Yours will ride it down or try to get it flying again. Your choice. There won't be a middle class left to shelter in.