I mean we can, we can sort of understand why OK, the total energy, if we measure it, we measure a process which is not reversible.

The transition is safe, reversible, and incredibly easy, and unlike a conversion to XFS, JFS, or ReiserFS, you don't need to back up and recreate your filesystems from scratch.

Wirr Minus w irreversible, this is the work which is done to the environment by the system, -Wrev minus w irreversible is always smaller than minus w reversible.