Rocket,
Don't sweat it. It's a car, not a tank. My wife was giving me the what-for when I asked to use her Jeep the other day when we got 5" of snow overnight. "Great. Now you own TWO cars that you won't drive in the winter".
So the next day I headed out in the new M5
with stock tires in about 2" of the "stuff". I have to report that the car REALLY SURPRISED ME how good it was in the snow. The DSC works beautifully. MUCH more traction than I has envisioned, and great balance.
Some background: I always have "winter wheels and tires" on my vehicles in the winter months, even my Wife's 4WD Jeep. And my former car was a front-wheel drive Ford Taurus SHO with Blizzaks at all four corners. So moving to the rear-wheel drive M5 with performance tires really had me spooked. But not for long!
As you know, I just bought a set of Dunlop Winter Sport S2's for the M5 next winter. I'm actually excited about
DRIVING the M5 year 'round now. No need to tuck it away for 1/2 the year!
And now I have the perfect excuse to order those Fikse wheels....