Drones are managed very poorly in busy airspace, and tend to crash if there is a link failure. Currently, I think that airline Captains have to specifically set

Drones are managed very poorly in busy airspace, and tend to crash if there is a link failure. Currently, I think that airline Captains have to specifically set the auto-pilot to fly the final approach and landing, and be ready for a manual go-around if required. Typically pilots use "preset" auto-pilot only for enroute flying to initial hold point, then sometimes use fixed-rate decent with heading hold mode after that, until they turn onto final approach.