I think you might be onto something there..
Dont see them around here either. We had an OLD two row layby plow that was three point hitch set up to lay by tobacco. I never saw anyone adjust it, and it was used once a year. It worked good for that. I guess if I had enough cubs that I could set one up with plows and never change it, It would be ok, but since I'm not a MCC member yet, I'll stick with the disc hillers.