In constant dollars cars are actually pretty much the same as they were 40+ years ago when you compare similar types and trim levels. A new Honda Civic for example costs about the same when you take into account inflation as the Civic I bought in 1989.
The average price people are paying for a new car now is (in constant dollars) about twice what it was back when I got that '89 Civic, but that is because a larger percentage of buyers nowadays are buying bigger and/or more luxurious cars.
It's quite remarkable when you take into account how much more technology and safety features are in new cars. My '89 Civic didn't even have cruise control.
You've got the cause and effect backwards here. The average purchase price of a car in constant dollars is about double now because those are the only cars to purchase and the only group that can afford those cars are those who are affluent. In general the people who purchase new vehicles ironically are not the ones who own them. They consistently purchase new vehicles at a regular cadence.
The existence of some base model Honda Civic or similar doesn't imply you or anyone can actually buy one.
A 1999 Honda Civic or Toyota Corolla, assuming serviced regularly (and competently) could easily be on the road today.
I genuinely do not believe a 2025 car will usable on the road in 2035 (a mere 9 years), yet known 15 or 20 years from now. They are all too hamstrung by technology and whilst some of the technology is an improvement, a vast majority if malicious.