Hello @globetrotterdk ,
Just elaborate here a bit, Silverblue is the Atomic version of Fedora Workstation, Kinoite is the Atomic version of the KDE spin of Fedora Workstation, etc … for the other Fedora Atomic Variants. So the assumption all the Atomic variants are based on Silverblue itself is not correct. Each one derives from whatever Spin of Workstation.
Ublue uses a different form of distribution, thats where the container thing in the command comes from.
And afaik, they use a different signing tool. You need to rebase to the unsigned image, then rebase again to the signed one.
After that you can rebase directly to any other ublue-derived image afaik. No details on the reasoning, somethin in the fedora images is missing, I dont know.
Also as I mentioned, you can for sure install akmods and add those drivers. But really, just use the ublue-main images for the distro variant you already have. They are not very opinionated and dont introduce drastic changes, so it is fine.
Interesting is that they dont really care about their origins. Many where GNOME protest desktops, so no Distro uses Mutter. Some use wlroots, and no idea what budgie will use in the future.
I hope KDE and GNOME could just fix wlroots, implement their stuff and switch to it. This would give some kind of X.Org, where Desktops would be easier again, and development would have less duplicated effords.
But Cosmic is also really cool tbh, as its written in a memory safe language, saving lots of troubles if errors should occur.
Also for Window Managers, there is a lot going on
Wayblue delivers some alpha-level images with more available than Ublue or Fedora