This is a good intro for anyone who already has at least some background in ML and wants to get up to speed on LLMs relatively quickly. Props to the author for giving credit to Bandanau et al (2014), which I believe first proposed the concept of applying a Softmax function over token scores to compute attention, setting the stage for the original transformer by Vaswani et al (2017).
The big question here is what's next? So far my coding experiments with GPT-4 shows it's a shallow thinker. It has ready answers for many questions. One step further and it fails miserably. Much better but not a full replacement for google search.
[1] https://cyc.com/