A useful idea!

Alternative - version files and catalog those versions (most of the work, with "Unfucked", appears to be catalog management), building it on top of a Versioning File System.

E.g. NILFS logging file system, logs every block-change (realtime)

more:

- NILFS https://en.wikipedia.org/wiki/NILFS

- topic https://en.wikipedia.org/wiki/Versioning_file_system