User blog comment:VickyC/Intro to Wikia’s Development Process/@comment-655-20111014093307/@comment-13301-20111015114633

When Wikia realizes that if they make a poorly developed feature optional nobody will use it and the effort invested into developed it would be a waste they decide to not make it optional. That's how it works. Otherwise I couldn't find another explanation, except the last-resort consistency thing.