User blog comment:MisterWoodhouse/The first Unified Community Platform release is now live for NEW wikis/@comment-1998339-20200313113046/@comment-1998339-20200313184554

I think Rappy was referring that code's usage in a personal context, since a few lines prior to that, Dopp said the following: "That [referring to Wikia's addition of a custom class selector for nonexistent categories] is exactly what we're doing. It will be live on Wednesday. The distinction is that we'll allow this custom CSS for personal view, but not for wiki-wide changes (so visitors can have a consistent experience across wikia)."