It was more like: "Oh crap, here it is." It's not like the community was surprised. Many of us were educated on the principles and understood the possibilities.
I haven't seen anything this big developed so fast in my life. I have used more Copilot UIs than I can remember. Drastic sweeping changes to how it works and integrates. Just amazing. The pretrained LLM community is hot and a lot of people are tinkering again. It reminds me of the PC explosion of the 1980s-1990s.