Originally Posted by
Elkhound
What if it isn't [I]your/I] car, but a friend's? What if you're taking a trip out of town and renting a car and will be wanting to cycle at your destination?
Or what if you are travelling by train or bus? You can ride to the station, fold your bike and check it through, then at your destination, unfold it and ride off.
These are good points. I just don't know if you can build a folder cargo bike that will still be strong enough to haul as much as a unified frame. If you can't do that, its utility becomes much more limited, and I'm not sure worth it.