The split is even stronger on NetBSD, where /usr is the base OS and /usr/pkg what's installed by the user through pkgin (binary packages) or pkgsrc (ports).
Likewise, the system configuration goes to /etc while the userland configuration goes to /usr/pkg/etc.
All it takes to factory reset a NetBSD system is an rm -Rf /usr/pkg.
Likewise, the system configuration goes to /etc while the userland configuration goes to /usr/pkg/etc.
All it takes to factory reset a NetBSD system is an rm -Rf /usr/pkg.