Though I put some similar RSS feeds in one folder, many articles about one certain topic will still be separately presented. For example, I put Macstories and Macrumors in one folder, articles about iOS 11 will still be presented according to the time they were released which may not be the most convenient way to read.
So, is it a good idea to create some smart folders(like the mail app on macOS)to stream articles according to some keywords user set? It is not necessary to find these keywords in the whole articles, just the titles of them will do.
Also, it would be great to filter and train articles according to these keywords.