Drone lessons and the less visible electronic war

Beyond drones, which recent offensive or defensive technology has effects that the public has not yet fully seen?

Electronic warfare, because its successes, limitations, and investment are much less visible than drone footage.

Visible successful strikes can make uncrewed systems look like a universal answer. The same conflicts also contain many cases in which drones are disrupted or destroyed. Electronic warfare may be the more consequential recent capability whose effects remain obscure because operators do not publicize methods and results. Procurement patterns can offer clues, but even budget figures may be deliberately buried.