The 4WD would make sense in very strong cars and if you live in the mountains. I live in the black forest of Germany... also a known cold area but still hear I dont have problems with the 2WD in strong winters. The modern cars do have so many gizmos.... I think the 4WD is for cars up to 400HP (and normal weight) totally overrated. If I see a C63 which is light and totally overpowered its a different story.

For example - I have choosen the integral-active-steering in my BMW 7 ahead of the 4WD (you can't combine both). Also I did the same for the Porsche as I wanted to have the little bit more trunk space and the Porsche handles so easy and fun with the 2WD, I just didnt want to have the 4WD option. On a Turbo I would have choosen different (even though there is no choice - I know). While I'm happy having it at the Range Rover a versatile car I take to the mountains for skiing every weekend and as I'm going for hunting I love to have it out in the rough - it must have 4WD.

For me 4WD is an option I still consider on the car specifics and the purpose.