I think it’s time for Glyphs to have an auto save feature. I’ve got used to Glyphs being stable and not corrupting my data. So I’ve lost my habit of saving every thirty seconds in case Fontlab blows up. But some of the stability and undo bugs in recent versions of glyphs have wiped out hours of work for me. I would be more comfortable testing cutting edge versions if I could set Glyphs to save every X minutes.
Sounds like you want auto versioning rather than auto saving. (If your file gets corrupted then auto saved, that’s bad.)
The system does that already. There should always be an Autosaved version next to your font file. Or you activate Versions in the app preferences.