Actually, we all have lockers, sort of. Early this year in the snow I went out and played in a huge parking lot, 2hi, 4hi, 4lo, esp on, off, all combos. Drifting, donuts, panic stops, you name it I did it. All in the name of research, mind you.
What I noticed the most was the computer braking the wheels that were slipping, and doing it dynamically as the conditions changed. I couldn't get stuck, no matter how hard I tried. Granted, the snow wasn't that deep, but the lot had hills and I had no problem going up them.
All this was confirmed when my buddy and I put the lift on and flexed it out on his property. We found a spot that teetered the Jeep on opposite corners when the front swaybar was still connected, and I watched from the ouside (my buddy was driving) how it works. It would spin the free tires just a bit, then I would hear the ding-ding from the dash, and those wheels would stop spinning and it pulled itself along with no problem. I was fairly impressed with both the hardware and software of the system. BTW, mine's open on front and rear.
I'm patiently waiting for OX to have something available, hopefully soon.