Not needing root is a game changer. Another benefit is that "traditional" package managers may litter your system with configuration files and post-install scr

Not needing root is a game changer. Another benefit is that "traditional" package managers may litter your system with configuration files and post-install scripts (for the software you are installing and all of its dependencies), some of which can persist even after uninstalling the packages. Nix prevents that by design.