Board Thread:Support Requests - Designing Your Wiki/@comment-32737051-20190126073925/@comment-36497343-20190126131908

According to the page history, it was released (in beta mode on specific wikis for a trial run) around 11th March 2016. No wikis (whether created before November 2016 or after) are able to switch back to forums.

However, if you want a forum-like feature on your wiki, try the original forums (wiki-style forums). If they are in an archived state on your wiki and the forums feature is not active, contact FANDOM staff and they can remove the archived note. This way you can use a basic style of forum with the Discussions feature.