Also: Pizza delivery is one-to-many, in terms of locations. Traditionally, one shop had one or more drivers who would deliver multiple orders in one trip, and

Also: Pizza delivery is one-to-many, in terms of locations. Traditionally, one shop had one or more drivers who would deliver multiple orders in one trip, and then return back to that same shop to pick up and deliver the next round. This is very different from services like Doordash, which are many-to-many in terms of locations. There's a huge efficiency loss here. Also different: Pizza delivery was single-source. If there was a problem with the order, the driver could fix it. Things like "Hey, man. You forgot our bucket of soda" could be fixed pretty quickly and painlessly -- they'll just bring it over on the next round, usually rather quickly. Things are not this way with Doordash.