I've had my code editor's configuration set to auto save for at least 15 years at this point. I've never had the problem of not being able to throw something away that I wanted to throw away - either it's in the git history (broad edits), or it's in the undo-history (fine edits). It helps to have an undo history that survives restarts and that preserves branches, which I guess may not be a default for every editor