Every forum admin thinks their forum is unique. 
In my forums, the majority of posts are responses via email, and people tend to respond to any recent post rather than keep them within coherent topics or start a new topic on a new subject. That’s probably because these have been email-based lists for 30 years. (The first one was started in 1991.)
I figure as long as they’re more or less on topic (ie, football-related posts are in the football category and not the basketball one) it isn’t worth trying to move things around.