This all seems nice in theory to think of it has some utopian future with robots flying all around. However, the economics of small UAVs carrying cargo do not make sense. It simply isn&#x27;t worth the cost and it isn&#x27;t efficient to lift small amounts of weight. Otherwise FedEx, UPS would be doing it.<p>It&#x27;s more efficient to use a large winged craft that has immense economies of scale in a hub and spoke distribution architecture, just like FedEx and UPS do.<p>Things may change in the future but right now the overhead of UAV flight is too significant. Also, too complicated. And keeping in mind it&#x27;s much harder to control a lightweight craft in 20 mph wind than a large jet.