User blog comment:MisterWoodhouse/An update on the Forum retirement plan/@comment-39691548-20191217205920/@comment-168424-20191218004534

Not sure if this helps much, but admins can edit posts indefinitely as far as I know. There are good reasons for having a time limit on editing for non-roleplay situations, but it would be good to have a way to allow forever editing for some posts. Part of the problem is that Discussions doesn't have separate boards like Forum, since I doubt Discussions categories have any real meaning for setting different permissions.