Yeah I call bullshit. People don’t want modern cars because they are low to the ground, smaller and harder for people to get into.
As a 6’2” dude every time I get into a rental car I smack my head and have to contort myself to get in and out. There is also never enough room for anything beyond a few suitcases. I always breathe a sigh of relief when I get back to my truck after a long business trip in a car.
Crossovers and trucks are popular because they have space and are easier to get out of. Full size cars from the 80s tend to be way bigger than full size cars from today. Once cars started shrinking and getting lower to meet EPA mileage requirements which is also the same period of time when people started abandoning cars for trucks and SUVs in the 90s.