Something I've learned is that snow tires make a big difference during the winter, and I've read that they make a bigger difference than AWD.
And, even more important, you have to keep a level head when you see that there's snow on the road and not try to do anything crazy, like making sudden left or right wheel movements. Also try to keep a safe distance from the vehicle in front of you, and, before you venture on a trip outside of the city, just check the weather forecasts: if there's a "red code" storm announced you'd better postpone your journey, only a tank can get you out from something like this: https://www.youtube.com/watch?v=Frf2lV77fl0
So you don't need 4WD (let alone a tank) if you have some sense. Which is why a lot of people buy 4WD vehicles, I guess.