We went from Google having complete control. To Open AI releasing GPT2 which really inspired a lot of people to try it. Then GPT3+ convinced the world to try it.
After that, Gemini, LLaMa, every type of fine-tune... The noteworthy thing is that LLaMA was good enough that ChatGPT had competition. Then within 1 year of that, we have a dozen companies with models that are good enough.
The competition has been the best type of brutal.