It's such a shame because back then even Windows was motivated by actual human user research and had thorough guidelines. https://ics.uci.edu/~kobsa/courses/ICS104/course-notes/Micro... (HN discussion from a few years ago: https://news.ycombinator.com/item?id=22475521 .)

https://movq.de/blog/postings/2026-06-16/0/POSTING-en.html was an interesting look at Win2K's UI controls and how much clearer they are compared to modern UIs.