Lets see lack of brake fad, weight loss, Better stopping power. If you have to buy drums, hardware and shoes you are getting closer to the cost of Wilwoods. If rear drums were so good they would be still using them.
Big rigs still use drums. They haul 80,000 lbs so you think they use drums for nostalgia's sake?
Disc brakes started appearing on the Kenworth manufacturing line over 10 years ago. (Class 8 big rigs). First on the front, then it wasn't unusual to see them on all axles.
They are an option, so it's pretty obvious that money is a factor. Also, big rig drums are insanely heavy.
