[vfclists]

Why should the store send a small robot to deliver it you?

You can ride a bicycle to the store to pick it up. Just think of the cardiovascular benefits.

And you know what? Think of the energy cost of the robot's manufacture, and the energy the delivery takes.

[decafninja]

Because rain, snow, heat, lack of fitness, security, amongst other reasons.

Cycling is my most common mode of transportation these days. I love it. But I also know it's not going to be practical primary means of transport for a huge slice of the population. And the "danger from cars" ranks pretty low in my list of reasons.

[hasmanean]

A bike cannot compete in terms of energy efficiency with a slow robot that delivers multiple packages to people along a route.

Human food is the most expensive fuel on the planet when you factor in agriculture.