User blog comment:Cristina7/Introducing Discussions, a New Platform For Engaging Your Community/@comment-27172764-20160908154328/@comment-5275700-20160908155925

Actually, only 10% of logged-in user sessions and 1.5% of anonymous user sessions use the Full site on a mobile device.

In any case, Discussions has a fully responsive layout that works much better in mobile browsers that the current Forum's layout.