I just spent two painful hours in a work meeting trying hard to distinguish between requirements and desirements in a fiscally constrained effort. And then I made the mistake of popping open this thread.
We seemed to have drifted from the winter bike to the backup bike. I think it's reasonable to the point of essential to have a Plan B. For one person, Plan B might be to be a few minutes late. For another, perhaps that means having a Trek Madone on strip alert to mitigate the few minutes of delay incurred switching to Plan B when A became untenable. Players' choice.
Maybe there's a strong argument to made that you don't just
want a winter bike, you absolutely
need not one, but TWO winter bikes. Just in case. On an icy day.