I feel that I am 50:50 on it, immutable at least conveyed more information about what it is while Atomic feels a lot more “buzz-word-y” and does not convey as well what it means. Regardless, I’d say the bigger issue is keeping the old Silverblue & Kinoite names, they really should change them even if it means having a ~2 year period of having “Formerly Silverblue / Kinoite”.
I’m not sure if I agree, I feel like the long term damage of keeping the names is greater than changing them now to Fedora Plasma Atomic (Formerly Kinoite) / Fedora Atomic Workstation (Formerly Silverblue). Leaving them as is, is just going to create more confusion in the future to new users who won’t immediately understand why the naming convention is different for the other spins and will create more confusion for documentation / support threads online.