technically you are right but in the press/blogs/posts the word people were actually using was "immutable" to describe Silverblue as well as others like Opensuse Aeon and VanillaOS.
Me too, I understand SB and Kino have a lot of brand recognition but they could've found a more elegant coherent solution. Like changing everything to "Fedora [DE] Atomic" while also maintaining the code-names as an abbreviation for people in the know.
Just like a general choppiness that made it seem like VRR wasn't working. Also seemed like more choppiness and stutter during mouse movements or panning. There's some more description in that bug link of how others perceived it
Also, where does a distrobox container get its hostname from? I edited /etc/hostname, but anytime the container spins up, it goes back to what it used to be.