Top Gear checks out the Peel P50 - a tiny and somewhat silly car from the early 1960s that would be the worst thing imaginable for a friend and her forty inch inseam. Post WWII Europe was short on many things and there was considerable experimentation in this area, but a bike is much more practical than many of these designs and the world went in another direction.
It is reasonable to think about the right form factor for various types of transport. Somehow 3500 pounds carrying a 130 pound driver and 20 pounds of groceries seems wrong. Assuming you have safe roads, bikes and assisted bikes are going to rule on short trips in mostly good weather, but a 1000 pound vehicle could get away with a modest load of modern (lithium-ion for example) batteries and might be the basis for a neat city vehicle. Maybe even one for someone with Colleen's legs.