Comment by chillfox

Much faster launch of applications/files you use regularly. Ability to always rollback updates in seconds if they cause issues thanks to snapshots. Fast backups with snapshots + zfs send/receive to a remote machine. Compressed disks, this both let's you store more on a drive and makes accessing files faster. Easy encryption. ability to mirror 2 large usb disks so you never have your data corrupted or lose it from drive failures. Can move your data or entire os install to a new computer easily by using a live disk and just doing a send/receive to the new pc.

(I have never used dedup, but it's there if you want I guess)