I agree with BeyondTheRainbow's sentiments. I would like to keep the threads visible without them disappearing from view after 100 days. I mean, I know people can search for the threads via the search bar if they "disappear," but I think members would have an easier time browsing the threads/forum if everything was kept in view. Plus, I think we'd have repeat threads because people would assume they don't exist if they don't see them.

So, is there a way to change the settings for that particular subforum such that threads which have been inactive for 100+ days are not "timed out," or so to speak?

I know people can edit their personal user settings such that threads older than 100 days are "browsable," but I don't think most people would adjust their personal user settings because they don't know about it or don't know how to.