From the bottom of the linked page: "Prior art: KDE neon, KDE's first version of a self-made OS. KDE neon fulfills the "distributed by KDE" requirement, but fa

From the bottom of the linked page: "Prior art: KDE neon, KDE's first version of a self-made OS. KDE neon fulfills the "distributed by KDE" requirement, but fails on the reliability angle due to the Ubuntu LTS base that ironically becomes unstable because it needs to be tinkered with to get Plasma to build on it, breaking the LTS promise."