close to your guess. automakers (especially in the US) have concentrated for so long in producing expensive, gas guzzling SUV’s. now that gas prices are up, these cars are no longer desirable, and the car companies are seeing huge debts because of it. another reason is based on the loan industry. for a long time, the auto industry was able to give loan programs that introduced 0% down and 0% financing (same sorta thing that happened to the housing industry). they are now feeling those results as well in a giant snowball effect.
think about it, how many “new” cars do you see among the plenty you see?