I often open some png or jpeg, edit it and want to save it. But no, I have to export it, confirm that I want to overwrite the file I am editing, and then confirm that I don't want to save to .xcf before closing file or Gimp. Infuriating. It makes me want to fork it just fix this nonsense, but I doubt anyone would want to go into trouble to install my fork. If gimp team don't want to change default behaviour they could at least add a setting to .gimprc: insane_export_behaviour=off. I know I would use it.</rant>