https://www.insidedrones.com/blog/b6n75/How-Drones-are-Changing-Air-Transportation
Most modern passenger jets in principle are drones, meaning they can fly themselves without the intervention of a human pilot and certainly without the intervention of a human pilot on board. During almost the entire flight of a modern jet airlines, the computer is in fact flying the aircraft. Enormous cost savings would be possible if on board pilots would be entirely replaced by computers, supervised perhaps by remote human operators on the ground.