Thanks for the responses. To clarify, by "do it all" I meant do it all commuting wise for me in particular. Not do it all for any riding I might do, or do it all for all commuters.

I suppose it would have helped to describe my commute. It's 12 miles each way on suburban and rural roads with bike lanes or wide shoulders. I live in Colorado (300 sunny days/year) but it does get cold and snow now and then.

I do like the idea of changing tires as needed. I've probably switched bikes five or so times so far this winter. I don't think the tire changing would be all that onerous.

Paul