"Delete" is the wrong verb, suggests I'm deleting the file, which I'm not. Sure you could say, well you're deleting the unsaved changes, but this isn't what it means on any other computer or even in other Mac apps.

The same update (Lion?) ruined saving overall. Apple has insisted that apps should never have a "save as." You can hold opt to do it anyway, but it silently overwrites the original too. Maybe or maybe not lets me revert, and idk where even those revisions are stored. Apple might've hoped this catches on, but again nothing else does it this way. I get they want me to duplicate the file first, but no, I already made changes that I want to save-as, it's too late to duplicate.

If they were going for blurring the line between memory and disk, that didn't work either because there is still the concept of saved vs unsaved changes (that can get "deleted"). It's not like Google Docs.