My Expy's have all lived outdoors in NYS year round. My garage is full with woodworking equipment so in the driveway they live. I always thought garaging was not the best anyway in winter because they get coated in salt and ice when driving - then would have the opportunity to melt and sit (pickle) every night if garaged. IMHO they are built to take being outside it so it's fine. If they couldn't handle being outdoors ... that would be kinda crazy.
Having said that, I make sure I don't park long term under a tree or you get the sap drips on the body which is BAD! I also face the windshield away from the direct sunlight to prolong the life of the plastics inside the vehicle and/or add a windshield sun shade inside. Sunlight is powerful and can degrade materials long term. Unless you put a vehicle into some kind of deep sleep, its better to run it every couple weeks anyway isn't it? Run it and drive it long enough to heat everything up and make sure its lubed. Vehicles don't like to sit idle. What about the battery, it would go dead after a couple weeks wouldn't it? then freeze?
Any vehicle sitting outside with no cover, I brush the snow off when possible and let it melt / dry. Would not want a snow covering for too long
My nephew has an expensive boat and was dead set against storing outside in winter with any cover (other than the wrap which was $1000). He said a fabric cover will wear on the paint as it moves with the wind and that would not be good.