10 years ago I got into RC planes for a summer, and me and the guy were talking about how ridiculous it is that the milirary is spending so much money on simple drones, when they could just strap some explosives on a cheap hobbyist RC plane/drone for a fraction of the price, and just create swarms of them.
The technology had been widely available for some time already back then. Turns out, it was just lacking a war to do so.
(Just to be clear, we were all anti-war in general, this was just idle speculatiok back then. But if our country was attacked at that time, I'm sure some of us would have ended in a newly created drone force like what happened in the Ukraine.)