Save functionality

[Twinbeeman]

Hi, i was wondering if it could be possible to include an option to enable/disable backup save functionality in the next kernel to make sure the previous save isn't lost in case an unexpected error (or user related mistake) may compromise the last saved file.
I was also wondering if something that would slowdown a game when saving could be a possibility just to make sure saves are never messed up upon powering off, I presume such functionality could come off as annoying in certain games that autosave but for others (and I'd argue that even in those) it could be a really nice extra safety measure (in case this is actually feasible at all).
In any case, thank you for your attention.