The forum now tracks what posts you have read!
For me it was exhausting to track what forum threads I've already read. I think I also missed a few posts and may not have responded as frequent as I should have.
From now on the amount of unread posts is shown as a badge 1. This badge is shown for the forum menu entry, the forum page and for each category listing.
It keeps track on a per post basis, so aggregated numbers are shown. For instance:
Forum menu entry shows 5
News shows 3
The news page shows 1 for a news you haven't seen yet.
Once you open up a thread it is marked as read for you.
If you don't see any: Note that you need to be logged in to see the forum badges.
Let me know what you think!