Yes. For example when you're using snapshots but download new versions of something on the live volume then most installer software just overwrites the old files with nearly or fully identical new files. Running an offline dedup will then go back and reintegrate the new files with the dupes on the snapshots.
Lots of software is not as CoW-friendly as it could be, offline dedup fixes that with relatively low overhead.
Lots of software is not as CoW-friendly as it could be, offline dedup fixes that with relatively low overhead.