I also worked on all of the copy myself, collecting feedback from core maintainers as I went. The new tagline was a suggestion from Theo which we iterated on. I did use LLMs as an assistant, but I did not ask it to generate the content.
Might as well use LLMs for the whole thing next time, since we will be accused of doing so anyway! :D
FWIW, I don't think the site fits the LLM template. The scroll through the use cases is particularly nice.
And thanks for Elixir. I love it, and the agent + tidewave loop is a joy to use!