We got 4-6 inches on two different occasions this past winter, and I didn't use the 4x4 until I got to a hill that had a wrecked SUV I had to get around.
On the other hand, it has been in 4x4 countless times to get me out of muddy race track parking areas,the family farm,wet campgrounds, etc. I can't imagine not having it, and snow is the least of my worries...