I think a major problem with DoorDash's new drone delivery service is that it has to deliver to clear ground, which means you have to go outside to get your food, it won't be right at your door. If they really want to provide a good service they need to have drones that can open the door, come inside and drop off direct to your lounge chair or bed. Or maybe the robo vac could be taught to multi-task and meet up with the drone for the final delivery leg?