Thread:Josephyr/@comment-31423430-20160104054816/@comment-303594-20160104060037

The way categories are implemented is that they are on the individual pages, so the category members are not defined by the category itself, but the pages themselves have categories. So renaming a category would just change the name of the category, which wouldn't help because all the pages were still in that old category.

A way to think about it changing your phone number. Everyone else has your old number in their phone, and they'd have to update to the new number in their phone otherwise they'd still have your old number.