@Aldo2
I might not be an expert, but as far as I understand:

Tere is no "Drone age". These quadrocopters are literally nothing but a childerns's toy that happens to be capable of carrying an explosive. The price of entering this stage of military texhnology is literally ONE dude with an electronic university, or a decent stage of autism. If you offered to triple my salary, I can assure you, that in 30 days, I would be prepared to start manafacturing these drones.

The only real reason they got to be used now is, that modern states got from a cold war stage into an actual conflict, so state of the art technologies are not as useful as mass produced ones. But if quadrocopters weren't used, it would be simply replaced by a cheap guided misiles instead.

@Aldo2
Here is a riddle.
A young boy walks into a sheets shop. They sell sheets of all colors and sizes. From small bed sheets up to the biggest bed sheets. The soft ones and even extra soft ones.

And the boy says, that he needs some fabric. How do you explain to him, that you only sell bed sheets?