User blog comment:Cristina7/Introducing Discussions, a New Platform For Engaging Your Community/@comment-26140804-20160912025934/@comment-26611127-20160912201112

Nowhere does it state that Wikia did not finish Forums. They did finish it, but the Forums feature does not have great mobile compatibility. So, Wikia decided to create a new and better feature rather than overhaul an existing one.