The Crumbling Foundation of America's Military
theatlantic.com
theatlantic.com
I think that's typical of the technology maturation process. Early on, the technology is immature and simple, innovation is happening rapidly, and complex, integrated, refined R&D processes and machines have little value. Later, many lessons have been learned, the technology becomes more mature and complex, and big and expensive becomes much more powerful than small and cheap.
As of todoay, small and cheap drones make sense; but small and cheap manned fighter planes would be ridiculous. Some day the drones will be like the fighter planes in maturity and complexity.