Fedora Silverblue
I recently spent a week trying out Fedora Silverblue so keep in mind I am not running it anymore and actually installed guixsd (probably a article about that switch soon). Fedora silverblue is very experimental and a interesting concept. It revolves around the idea that there is a immutable base system which can’t be changed easily. This is the biggest aspect that is close to nixos and guixsd however the way you deal with this immuatable base is very different.