Well, no but actually yes. See the countless videos of people in Ukraine flying a DJI into a Russian airbase and just dropping fucking grenades on planes.
Also, consider:
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We already have military drones that are practically fully automated, and we had our first fully autonomous kill decision five years ago now.
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DARPA did some tests with an AI piloted fighter jet in 2022, it successfully killed all human enemy jets 5/5 times.
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The weakest part of an air superiority platform is the squishy meatbag flying it. Without having to worry about keeping a human alive, you can make air superiority fighters that are vastly more capable with high-g maneuvering and more compact air frames.
Now, Elon's not talking about air superiority drones, he's talking about drone swarms. Drone swarms ARE a real threat, but AFAIK they're more of an infrastructure threat in that they're usually worried about in the context of disabling ships, airports, etc. not individual fighter jets. For that, you get Vadim to tie a grenade to his DJI.