Picture this. One day you go to use your ThinkPad with the Lenovo dock you always use, and you find your screen blacked out. You panic for a moment because it seems like your computer is broken, then you unplug the dock, and the screen works again.
This happens after a kernel update. If the dock is plugged in, the screen goes black—meaning, you can't use your dock and all the peripherals and hardware you have plugged into it that you need to work.
Two kernel updates go by. It's still not fixed. It is a common issue. Wayland is the future, but its still buggy. Switching to X11 works fine, but I have a super high-res display (like most modern laptops), and X11 is legacy software, so it doesn't automatically scale the way it should, and it's frustrating to deal with inferior archaic interfaces when you know better solutions exist.