I’m on KDE Plasma with Nvidia and Wayland with the proprietary 530 drivers but really the experience (due to Nvidia’s own fault) doesn’t feel polished at all although it’s very smooth, but the fact of having to be constantly switching between Xorg and Wayland because one or another program doesn’t behave the way it should in Wayland (frameskipping, blank screen, tearing) and I was thinking if using the open source drivers could fix something or make it worse.
I remember testing the open source drivers some time ago and running the Terraria compilation for Linux was not working well at all, and that being a native Linux compilation, maybe the Proton version would have worked better.
I have tried the open-source drivers from time to time (last one v530) on a Thinkpad X1 Extreme and KDE Plasma (X11). Every time I switched to the open-source driver, the laptop unfortunately started to become uncomfortably hot – although the graphics card seemed to be working properly.
I looked on the net about this, and I remember reading that the open-source drivers were still in the testing phase. Sorry for not remembering more than this.