The fact that you don't manually save does not mean the files aren't represented on a file system. Source control, file transfer and editing in another program

The fact that you don't manually save does not mean the files aren't represented on a file system. Source control, file transfer and editing in another program can work unchanged. Though you would need to worry about atomicity when having a file open in two editors constantly "auto-saving" the document; you'd need some way to synchronise state. Probably easiest to make file write access exlusive by default.