Not taking sides, I like 'em both but prefer wingless, Just a couple of random thoughts:
A) I recall Karl Kinser saying he would never go back to wingless cause winged cars are safer, wing absorbs lots of the impact in a flip. Can't blame him for that....
B) My friend the late Steve Enslow, who owned USAC sprinters in the 1970s, said they used to run both winged & wingless, dirt & pavement. Everybody...that's how the sanction set it up. Wish I was watching the races back then....