[adammarples]

Not a solution to carrying passengers, or lots of bags, or in snow and ice, or very long distances, or going somewhere you don't want motorbike gear and helmet to worry about. I love my motorbike but it's not as practical as a car for lots of things.

[marssaxman]

It's funny - I find cars to be less practical than motorcycles for most of the trips I take, for example whenever traffic or scarcity of parking are involved - which is most of the time! - and if for some reason I could only have one vehicle, I want to say that I would choose the motorcycle, because life without it would suck; but then, a car actually can handle all the trips a motorcycle can make - comparatively slow, expensive, and annoying though the process may be - whereas there are a minority of errands one occasionally has to run which a motorcycle cannot handle at all. So perhaps the real answer is that it's too much to expect any one mode of transportation to handle every need.