"Drones work well when used against a disparate and unexpecting opposition. Against soft targets. Vulnerable and unsophisticated enemies. I've written at length about how much damage you can do to civilian targets with COTS drones, and year over year, the reality of that is proving the truth of the statements.
But most of our experience, or anyone else's, with drones, is against 19th (or 6th) century opponents, with no tech to speak of, and battle tactics from no more recently than 1900.
Peer-to-peer, not so much.
A drone that kills "any ship it finds" will wipe out your own fleet too. Even in port. Russia and China are totally dependent on imports and exports, whereas the U.S. is food and energy self-sufficient, and most of our trade goes on north and south, not east and west. Well-played." - Aesop at raconteur report