I will de drive a fair bit in snow, and I worry about i4wd... a lot of spinning meaning that the brakes would work fairly hard.
I know with my (GM) truck, if I am in a significant amount of snow, I used 4WD mode, not auto, and turn off traction control. Otherwise you can hear the ABS being applied, and the power keeps cutting as ECM senses the slippage.
After reading this thread, I realize that i4WD is different than traction control and auto mode, so I am less worried about it. The fact that the ECM won't cut any power like TC, the rear does stay locked, make me feel better.
I do wonder about the situation within a foot of snow, going in a straight line, where normally all 4 tires would be throwing snow, if i4WD will be smart enough to just keep power to all 4, or if it will be trying to solve the issue by applying brakes to left and right front wheels back and forth. But I haven't read this complaint anywhere, so sounds like it is smart enough to handle it.