Let's talk about the Drones.

I go to a field day at a seedbed, there is the drone, I go to an agricultural technology fair there is the drone, I go to a lecture on agriculture and there the drone will be, I see agricultural drones everywhere involving agriculture, except on farms. In my head they are a white elephant, very expensive and inefficient but then I turn to you, European and American farmers where this type of technology is cheaper and older. Do you use drones? Are they better than using a sprayer?