The biggest problem for automakers is that they have already sold everyone in
America a car or two. It is called market saturation. they had a slick plan to deal with that called planned obscelence, but Ralph Nader put a stop to that. Now cars cost a lot more and last a lot longer. It might have been better if union thugs had put out a contract on him, better for the UAW, that is.
Don't get me started on Nader. Unsafe at any speed, that guy.