I doubt that anybody cares. My suggestion back then was just bad.
'other-window-scroll-buffer' is an ill-advised concept which can fly
only if the buffer where it is set locally is small (so a user will not
wonder about what that buffer has been conceived for and, for example,
ask questions about its modes or keymaps) is displayed for a short time
only and the visibility of the buffer it refers to is absolutely crucial
for the current workflow. Neither of these conditions is given in the
present context and I doubt that they are given in any of the other
occurrences of that variable.