User blog comment:Cristina7/Introducing Discussions, a New Platform For Engaging Your Community/@comment-26402117-20160912093734/@comment-26402117-20160912144852

That's the great thing about a subforum design just for desktop - it would make the left rail 700px in a "Categories" tab. But the post filter would probably return in the other tabs...unless it becomes a collapsed element of some sort. I'm now wondering how a good button would be designed like.

In terms of subforum features, methinks a category from the "Categories" tab would automatically categorize posts made in it. Like with the old forums, having a category description for desktop would be brilliant.