I was answering to your comment in the current thread, where you explicitly said "long-range" drones. Long-range drones will always be more expensive than short range drones, and not in a linear way, in an exponential way.

Thousands of short range drones dropped from B2 bombers sound like an interesting idea, until you hear about JDAM bombs, of which the US has a virtually unlimited supply, which are cheap, and are incredibly powerful compared to anything one could attach to a DJI-sized drone.