When clicking X on an application, the user expects the application to be closed. Some applications linger around and get docked in the system tray. But giving the user the option to disable that feature and quit and close the application after clicking X would be an intuitive user experience
This fucking bloatware has half a dozen of processes running when closing the app like mobalytics. It should be a well known issue because you can find a lot of posts years back even
Can you share with us what apps are you talking about?