I'm sure thousands of Norwegians will disagree with you on dual motors being required. There are thousands of Model S pre-dual motors in Norway and somehow they manage just fine. A good set of dedicated snow tires even on rear wheel drive should be plenty adequate. Sure, dual motors and snow tires would be even better, but the belief that dual motors is required in snowy climates is overblown. And yes, I have lived in snowy climate most of my life and wouldn't think twice about having rear wheel drive only, with proper snow tires of course.