lol I'm not saying it's language I would use myself, or that it's fair to characterize projects like GNOME or Flatpak as 'belonging' to Fedora.
Personally, I liked Unity. Mir has turned out to have enduring value outside of the desktop space and also implements Wayland. I don't fully buy into the view I described.
I just think there was an intelligible argument behind that other commenter's strange language, and tried to point it out.
(Another possible reading is that Fedora is 'closer to upstream' because they don't do as much downstream theming of the desktop. I'm not sure if that was also part of what they were getting at.)