I'm reminded of the Acorn Archimedes: instead of a save dialog, saving produced a tiny "explorer" window containing the file, which you were expected to drag-and-drop to its save location.
RiscOS had some other interesting features, such as all menus being context menus. RoxOS was a short-lived experiment in bringing some RiscOS concepts to Linux, including AppDirs, only having context menus, and even the drag-to-save functionality.