>Rental scooters/bikes cover last mile service very well in my experience.

Not so great for family trips, shopping around, etc.

Americans would rather die than give up their air conditioned bubbles on wheels. I've wondered why someone hasn't tried manufacturing an enclosed go kart with AC and enough trunk space for a few groceries.

Let me guess… you live somewhere warm and mostly dry? Probably on the younger side and don’t have any kids.