Chat gpt 3 was 2020, even if the technology wasn't mature the hype was there informing investment and hiring decisions.
There was also other factors, there were covid booms, covid busts, overcorrections, Elon shoes you can cut by 90% and still keep a product running (kind of) and with X taking the flack other people followed suit without being as loud. There is a fairly major war in Europe ....
My understanding is that before Nov 2022, GPT models are obsecure, technical NLP stuff that most people don't understand or care about. ChatGPT is the first real product that is accessible and useful to everybody.
There was also other factors, there were covid booms, covid busts, overcorrections, Elon shoes you can cut by 90% and still keep a product running (kind of) and with X taking the flack other people followed suit without being as loud. There is a fairly major war in Europe ....