For single window apps it makes sense that closing the window also quits the app. For apps that can have multiple windows I suppose it would make sense for the

For single window apps it makes sense that closing the window also quits the app. For apps that can have multiple windows I suppose it would make sense for the app to quit when the last window is closed, but that seems less obvious that it should, somehow. One reason: The app might open with no windows, waiting for the user to open a file or something.