Electrically powered and controlled drones are vulnerable to electronic warfare unless really well shielded and that adds weight and cost. They also will continue to have pretty limited range. They have to be made, they have to have a power source for charging and a place to be launched from.. a whole logistics supply chain to make them work and limited payload. Someone will innovate and come up with a comparable inexpensive way to defeat them.. probably with other cheap drones or energy weapons. Shoot the Ukraine business they have been defending bunkers and such with nothing more than chain link fencing and I saw video of a soldier defeating a fiber optic guided drone with a pair of scissors after it flew past. Marc is spot on.. just another weapon system and innovations will come. To be sure we ourselves need to be able to build these in massive numbers in a short time and control the entire supply chain to make them without much in terms of external resources which are vulnerable.