What os do you use on your pc?

Oh, on second look I suppose you are correct. Silverblue and Kinoite kept their names, but Sericea and Onyx (and all future spins) use the Fedora [DE] Atomic structure. I was under the impression based on the announcement that all of them followed that naming structure, since they are collectively referred to as Fedora Atomic Desktop spins now. That actually seems much weirder than having changed them all to the same structure, because it was intended to lessen confusion, but now half of the spins use a different naming scheme than the other? Strange choice imo.

Here's the announcement I was referring to.