I'm on MacOs and when i close the application it is closed for good, wouldn't be nice to have it on Tray instead of closing it immediately.
also, group news dy days: like each day with it's own news ( little blocks maybe ).
instead of closing QuiteRSS you could use the options under
Tools -> Options -> System Tray
and f. e. minimize the app to tray.
You can always sort your news by received or published date.