> As an aside, standard search engines were no help in my research into the Fn key’s first appearance. ChatGPT scored a win, however, by identifying the PowerBook G3 Series on its first try—yes, I confirmed it with keyboard photos

Alas, now that I ask ChatGPT with GPT-4 (“With DALL·E, browsing and analysis” as that is my only GPT-4 option now) “Which Mac first had a Fn key? Please provide a source”, this blog post itself is the source that it recursively cites. I wonder how it knew that information before.