Here's my contribution to this thread. I commute daily starting in early March & ending in early December. After that the snow & ice is too much for me, personally.
I also use this bike for racing in fall/winter cyclocross (2nd set of wheels at home with CX knobbies) & duathlons in the summer, not that I am any good at either sport, but just to participate for the fun of it & pre/post race comeraderie is great. Most competitors would have blown by me like the wind but, after all that's said & done, we raced the same course after all & did the same mileage.
Have a great day!