It's true that 2D is a lot easier than 3D. It would also require a lot of new technology. It is a solvable problem, though, and we need to solve it to some degr

It's true that 2D is a lot easier than 3D. It would also require a lot of new technology. It is a solvable problem, though, and we need to solve it to some degree even today (due to airplanes). The need to solve coordination will only increase thanks to proliferation of drones, too.