Neil Ward-Dutton's weekly video shorts are excellent. This one is Episode 12: "AI is not a thing"
And he's right, it isn't "one thing". It is indeed "many things." The old AI saying goes, that AI is what you call it when it doesn't work, and "search", "facial recognition", "sentiment analysis", and "translation" are the kinds of words you use when it does work. So, effectively as each "thing" within Artificial Intelligence matures, it gets a name, a label on the tin, and eventually people forget that it is even a topic for AI. (See exhibit A: Search, or Exhibit B: first order predicate logic).