I don't remember where, but I read a lengthy comment from someone in the industry which said there were two main things preventing delivery drones from being a viable market: 1. FAA regulations - delivery drones can't operate within X miles of an airport (technically they can, but it requires a much stricter degree of certification and compliance nobody wants to bother with) 2. Drones need a landing space, so people…
That would make sense if this was some incredibly capital-intense thing to develop and enjoyed immense economies of scale. But I don't see why that would be the case. Surely there are many thousands of towns each with tens of thousands of single-family homes that are sufficiently far from an airport and currently served by daily package deliveries via automobile. Unless we're considering every tiny community airport.