Was nice that they mentioned some of their terminal utilities for scripting/automation. I ported my own scripts over just before Plasma 6 released and haven't looked back. And having those utilities made my own move to Wayland a lot easier.

There are still occasional things I miss from X11, like Barrier for example, that made using a single mouse/keyboard across multiple systems work like you were just on an extended monitor. But my move was very smooth, and I'm sure it will only get easier between now and the actual end of X11 support.