User blog comment:DaNASCAT/Technical Update: November 8, 2011/@comment-168424-20111111223923/@comment-1025281-20111115024837

Actually, it's currently perfectly possible for article talk pages to co-exist with article comments. The only "replacement" that is forced for wikis with article comments is that the link at the top right of the article points to comments, not the talk page. Compare w:c:avatar:Talk:The Last Airbender: Legend of Korra and w:c:avatar:The Last Airbender: Legend of Korra.