User blog comment:Rappy 4187/Technical Update: January 11, 2016/@comment-30384903-20160112165533/@comment-1251315-20160112194809

Why do the code pages need to be in the MediaWiki namespace anyway? It just means that anyone who wants to create a script on Dev Wiki needs code editor and they automatically gain the ability to edit all the MediaWiki namespace pages there, which is essentially a major security issue. No idea why Wikia can't just customise Dev Wiki so that the mainspace isn't like your average mainspace.