User blog comment:HopelessNightOwl/Are categories listed anywhere?/@comment-4332975-20131101133150

I know that an Official Categories designation has been planned for some time. One of the things delaying it has been the fact that the definitions of a few older categories also need to be reevaluated. If they change, it would mean a lot of stories have to be gone through and either changed to meet new definitions, or else given a "Legacy" label to let people know that they predate the new standards. It's a big job and getting bigger every day, so there's been difficulty in getting it started.