Does the new site have a summary of "Posts since your last review"? I found this a useful feature on the old site ... it summarized new posts by topic, identifying what was new since one's last visit and making it easier to pick out the threads one wanted to follow ...
If there is a similar feature in the new site I have been unable to locate it ...
Welcome To The New Site!
in General Discussion
Posted
I think that you're looking for something this: https://thecobf.com/forum/discover/unread/ - it allows you to categorize unread content in a few different ways.