Board Thread:General Discussion/@comment-190.192.217.3-20180923213714/@comment-27345308-20180923224846

Wikia's version of MediaWiki is heavily modified and updating it will cause more problems than fix issues. It is "unsupported" by Wikimedia, yes, but Wikia still maintains their own code.

Besides, it's not like Wikia didn't do many backports from upstream MediaWiki in past.