I would have sworn that autosave was enabled by default in absolutely every software that has anything to save since like the 2000s
Possible that we're thinking about different features? Like for Microsoft Word, if I save a file to disk, make an edit, then exit out without saving (hitting "cancel" when it asks if I want to save) the disk copy is left untouched. That's how the most tools work as far as I'm aware. It does have crash recovery (which may or may not work better than LibreOffice's crash recovery, no idea).