ちょうどRedditのkdeコミュニティーのアンケート結果でてたから
貼っておくよ

投票数 966

468 48.4% Arch/ Manjaro or Other Arch Based
207 21.4% Debian/Ubuntu or these distro based except "KDE Neon"
99 10.2% KDE Neon
88 9.1% Opensuse
74 7.7% Fedora
30 3.1% Solus/Void Linux or other independent distro (Comment the name)

https://www.reddit.com/r/kde/comments/n9w3qq/which_linux_distro_are_you_using/