Containers are but one type of virtualization. What manages the host machine running the container? Nix (and Guix, the project I work on) can be used for ever

Containers are but one type of virtualization. What manages the host machine running the container? Nix (and Guix, the project I work on) can be used for everything: bare metal, virtual machine, container. Furthermore, the packaging strategy also allows for granular virtualization of environments. Sometimes all you need is to set a few environment variables ($PATH and such) to point at a specific set of software, and this is made easy because Nix doesn't use a global /usr directory and has a notion of "profiles" that allow you to pick and choose the software you'd like for any given project. If all you have is containers, everything looks like a crate.