Mind you, I have accumulated less than 7000 miles on this bike in 30 years. I am a much less intrepid biker than you. There HAVE been times that I have used it for commuting, although never in winter. There was also a period of maybe 7-10 years where I was using my "new" Marin bike as my primary bike. Then I realized that the new bike (which was the one with which I did the most commuting) was no longer in any better shape than the old one and I liked the old Univega better, so I went back to that one.

How many miles do you think it should take to wear out a wheel?