My 82 280ZX. RWD, light weight, summer tires. I drove it in winter once. We had a skiff of snow and I could hardly climb the incline from my friend's house to get the car home. And I lived in the middle of the prairies, so it wasn't much of an incline.
Once I (finally) got home, parked the car in the garage and waited for spring. My friend had a half ton that was way more stable than my car; there was simply no weight in the back end to hold it down. At least we could put a snowmobile in the back of the truck.