In GTEd, the combination of not being able to disable the autosave feature itself (only restoration from autosave), that the only toggle in the UI (which controls restoration from autosave) causes autosave files to never be cleaned up, and that also never-saved files are autosaved, sounds like a doxxing event waiting to happen when people don't realize that what should, intuitively, be ephemeral (things you type into a text editor but never save, and when it asks upon closing you choose not to save), are really anything but. I haven't looked more closely, but if GTEd behaves as described in your article, I would consider that a rather serious design issue.
Michael