Comment by Schroedingersat

The best tool for moving a person and up to about 300kg of stuff at 2-20km/h over nice surfaces.

Never need to charge/fuel it. A coaster brake model out of the weather can go years without any maintenance. Will work for decades with $50 worth of parts. Some models fit anywhere wheelchair accessible. Cheap enough that you don't need keys. Stores anywhere.

In an industrial setting they are extremely useful.