I'm not sure how old you are, but remember the sixties and seventies when 2 doors were the thing? Not to be mean, but most people back then were smaller. Today people are much bigger as in heavy. Today's people have a hard time getting in and out of two door vehicles. So as a result most vehicles are 4 doors. Aside from Camaro, challenger and Mustang can you think of a two door car? There are a few but most are performance speciality car. Every day sedans, suv's, crossovers and even trucks are 4 doors. My young son in law doesn't understand my obsession with 2 doors. He was looking at a 66 Impala that was a 4 door he couldn't understand why I didn't think it was a good deal. Lol
