That was my thinking too, until I started looking into them again more recently. They're now basically distributing variant alternatives of Fedora that usually

That was my thinking too, until I started looking into them again more recently. They're now basically distributing variant alternatives of Fedora that usually have far better implementation and design choices, but mostly use the same underlying technologies. They only have a few in-house tools, unlike Fedora that decides to spin new undocumented ones with questionable design each week it seems, and focus hard on rock solid performance. And they've been jumping in to fill the gaps RedHat leaves, while also pursuing the more modern edge compute/cluster corporations are very interested in. As an individual user's daily driver, the documentation is severely lacking for their immutable distros, but if you're experienced enough you can often find Fedora Atomic documentation to get you close. There are still some major hurdles though, like not all Fedora RPMs can be directly installed on OpenSUSE (e.g. CrowdSec) when there is no OpenSUSE version, and some corrected idiocies of Fedora Atomic cause problems (e.g. nix install for ostree only works on immutable distros with ephemerally writeable rootfs, which also eliminates 80% of the benefit of immutables but is the Fedora default and not the default for OpenSUSE).