Autonomous weapons are actually a really interesting branch of this and deserves a little more.

Yes, autonomous weapons were explored and were found to be poor performers compared to actual pilots. The breakthrough is in terminal guidance and dozens of other little techniques to get quality human control extended into the far reach of the battlefield. And of course, AI assistance in logistics and analysis. But actual autonomous weapons making any more of a choice beyond "something is moving, kill it" have been, at least for now, mostly a dead end.

This is because it's very difficult to economically load the rather sizable compute requirement into the compact one-use weapons, and of course reliable communications aren't assured either.

That will probably change some day, but for now, cheap automous command drones making battlefield analysis e.g. mapping out enemy movements from afar and launching cheap autonomous kamikaze drones is not a thing beyond occasional limited testing.