What really gets me is when docs aren't printable. When I want to explore a new tool, framework, etc, I don't want to stare at a screen. It's much easier on the eyes to print out the relevant portions, and make notes with a pen.
I used to file tickets for developers to check if their doc building tool supported output to PDF/HTML. A few humored me and did it, but mostly I'm ignored. So I stopped.
Haven't tried doing it myself with the help of an LLM!