I've used Gnome for a very long time but tried out Plasma 6.0 soon after it came out, and I'm very impressed.
I might switch back to Gnome some day, but KDE just keeps growing on me.
The seamless clipboard sharing feature between mobile and laptop is really cool, and that was just an unexpected bonus attached to a whole set of cool features. And everything feels cohesive in a way that I'm not used to.