Emacs user for 20+ years here. I have written a nontrivial amount of elisp. I like emacs; and, yet, I still sometimes get confused by the difference between a

Emacs user for 20+ years here. I have written a nontrivial amount of elisp. I like emacs; and, yet, I still sometimes get confused by the difference between a window, a frame, and a buffer. Sometimes I encounter a phrase like “frame buffer” and just ignore it to avoid going down that rabbit hole again.