Re: request: make-frame-visible hook

[Richard M Stallman]

     before-modify-buffer-hook  (run before changing buffer)
     after-modify-buffer-hook  (run after changing buffer)

Modification hooks already do exist.
Are they somehow inadequate?

     before-cursor-move-hook
     after-cursor-move-hook

Text properties exist to do this.
Are they somehow inadequate?

     before-window-buffer-change-hook
     after-window-buffer-change-hook
     focus-window-hook
     unfocus-window-hook
     enter-buffer-hook
     exit-buffer-hook

What packages would want these, and what are they trying to do?