User blog comment:BertH/Wikia's evolution continues with VisualEditor/@comment-13301-20131016191023/@comment-1693968-20131016193214

That's why they're not just installing and immediately releasing it. They've continued developing it a little bit more in order to make it work with the Oasis skin, as well as 1.19. I'd still be supportive of a 1.21 update, though.