My forum was far more active than it is now, so I divided some areas up to more niche subjects, for example... My "Off-Topic" forum was split into 4 subforums: General Off-Topic Technology Cars Music These are all very quiet now, with several weeks if not months since the last post, but each section has several hundred threads in. Would you merge them back into one? Or is it best keeping these still separated (for whatever reason, SEO maybe?) I also think with 70% of my traffic being mobile, people would prefer to do less scrolling through the different forums. Less is more, right?