Well, when it comes to getting where you have to go, size matters.
Ground clearance is a must in the snow, and if it isn't big enough to stretch out and sleep in if I do get stuck, I don't want to drive it.
If I can't get under it and change the oil without jacking it up, it's too low to the ground.
Besides, you can see further down the road if you sit higher up, and that gives you time to avoid problems. If you don't have long enough to avoid toruble, Bambi (no, not that one, the deer) doesn't end up in your lap.