apologies for having bad vocab WRT this. I totally meant to say topic this entire time.
Let me give an example of what I would like to see. Two topics in a madeup foo category exist. if I only had one category I could use /latest.rss to see the ordered responses/replies to these two topics. But since I have many categories, I cannot use /latest.rss to see just what is in my category. The feature that I would like to see is effectively a /c/foo/latest.rss, so I can get the chronological order of what is going on with all topics in a single given category.