Another reason might be availability. There were a lot more '32 Fords built than '32 Cadillacs. Plus they probably ended up in places they were more likely to be hot rodded. Many of the high end cars end up restored vs hot rodded. The old Fords ended up being sold for $25 or left to rust in some farmers field or barn. The old Caddys, Cords and Dusenbergs ended up in museums or well maintained in some aristocrats garage.

Pat