[dahart]

Car longevity has been increasing over time [1], despite anecdotes of a few long-lived vehicles here and there. So, cars are getting better by your metric. They’re also getting better by all other metrics: safety, fuel economy, speed, reliability, conveniences, comfort, style, etc., etc.

I’ve driven a still-running 70’s F-150 recently and owned a 2020s F-150 for a year. There is practically no comparison, I would never buy the 70s vehicle given the choice, they are worlds apart. The 70s truck is uncomfortable, slow, and unsafe in today’s traffic. It is also temperamental and requires more maintenance, cold in the cabin in the winter, hard to see when it’s raining or snowing. Probably the only thing I could say honestly about the 70s truck that’s better in any way is that the purchase price was lower.

[1] https://en.wikipedia.org/wiki/Car_longevity#Statistics