User blog comment:Cristina7/Introducing Discussions, a New Platform For Engaging Your Community/@comment-25648422-20160909022021/@comment-26611127-20160909024805

You see, the average reader would not look for a "desktop site" option. They just want to find out information about what they're searching for. What Wikia likely meant by Forums and mobile compatibility is that the Forums do not work well on the mobile skin (Mercury).

The aim of Discussions is to provide a forum like experience, that works well on all platforms.