I currently commute on a road bike most of the time and a rigid mountain bike with studded tires when the roads are snowy or icy.

The roadbike cannot handle the snow. The mountain bike is slow when the roads are clear.

Lately, I've been thinking about what an ideal commuting bike (for me) would look like. I'm wondering if there really is no such thing. Any single bike would necessarily be a compromise due to conflicting requirements.

What do you think? Do you use more than one bike to commute?

Paul