Title is misleading. KDEs new login manager is systemd only, but you don't need to use it and can use any other login manager or no login manager just fine. They're replacing SDDM since they can have the login manager be more integrated if they're the sole user. They'll still be maintaining SDDM and LightDMs KDE greeter if those are more your cup of tea, and you can always just use startx (or whatever the wayland equivalent is)

> Title is misleading Well, it's easier to get engagement with some bait.

I wish it wasn't more or less a standard these days..