So.
Two nights ago we were on I-81 in Virginia and it closed. We were able to get off in Pulaski and drive through 12 to 18 inches of snow in places through Pulaski and then into Radford. The snow became packed and iced but the 100 ate it up. We had no problems at all.
I tried both CDL and unlocked. Both had their advantages. When the snow was really deep, the CDL gave us the traction we wanted to push through it. When the snow was packed the Atrac only kicked in once or twice. The 100 motored on passed folks with all kinds of different issues. After a couple hours extra we made it to Roanoke and wine and Greek food. All thanks to the 100.
I will add that I went ahead and locked the ARBs to see how that acted in the snow and the rear end kept wanting to come around so I gave up on that.