Pijul looks cool, but "replace hard to understand directory content snapshots with easy category theory" isn't a compelling proposition outside of maybe the ML/Haskell community.
The main point of Pijul is, you never have to think about categories when using it. It's just a sort of Git where you almost never need to branch (the equivalent of a Git branch in Pijul is just a patch), merges are always deterministic and easy to understand, cherry-picking is the default, and works even for conflict resolutions.
