1 Magic are done within a second, yet it took the magician decades to master the trick. This quote fits the developments of AI perfectly, AI development started even before the Vietnamese war, yet the term only became relevant in recent years. Why?
2 Because AI has never been developed, the famous GPT's are not actually AI, it is in fact, an guessing program that works just like how you are trying figure out what answers the teacher would wanted in an exam. Every time it receives an instruction, it looks through the data base, and calculates which combinations of words are likely to be the correct answer to your question.
3 Still it is very useful, first it is a good tool, more importantly it brings AI to the spotlight, which I believe would speed up it's development. However, instead of focusing on LLM, I encourage you to study AI that is based on reasoning.