> Can install software to a home directory and so does not require sudo
> Install software not packaged by the native distribution
> Install up-to-date versions of software when the native distribution is old
> Use the same package manager to manage both your Mac and Linux machines
From the "Features" section of the Github.
It could also likely be used so make a "safe" Linux distro, where the base system is mounted read only, with a writable home partition.