Small delivery robots are in several (walkable) cities since a few years now. Starship was the first brand (they say in 270 cities, campuses etc.): https://www.

Small delivery robots are in several (walkable) cities since a few years now. Starship was the first brand (they say in 270 cities, campuses etc.): https://www.starship.xyz/ https://www.starship.xyz/ (City center properties don't have drone drop/landing areas.) (The couriers here use e-bikes and similar light vehicles as they can navigate quicker in the traffic.)