BJ, you missed the point IMO regarding offroad Jeep Wranglers: see Superdawg's post above ...

"Next is the one that the hardcore guys figured out, backing down extreme obstacles, like potato salad hill MOAB. Rear disc brakes don't loose any stopping power in reverse.
Drums do, they have a primary/secondary shoe system that is designed to work going forward, the way they work going backwards is greatly reduced."

I can verify point made by Josh, I've had several experiences where I nearly lost the 94 Wrangler attempting to stop on a steep shelfroad or monolithic rock due to the drum brakes not holding in my early days wheeling the near stock Wrangler in the Rockies.