Yes even KDE recently introduced a new display manager that is completely tied to systemd. For that reason it's not supported on FreeBSD. But sddm still works of course. But it is a worrying precedent.

From the gnome team this was to be expected because they are beholden to RedHat/IBM and the other big distros who push systemd heavily. But from the KDE team I didn't.

I've stopped my monthly KDE donations for this reason. Just to send a message that this isn't ok.