https://www.youtube.com/@arnoldrenderer/videos

Hello, just want to throw this out there if anyone at sideFX wants to take it up! would be cool if we could have some short videos about how to do certain cool stuff with Karma XPU like Lee has done in the link provided for Arnold.

I 100% agree.

In terms of Karma/Mtlx stuff Rohan Dalvi is some of the greatest stuff out there. I'll chew on this idea!
That being said Autodesk definitely has a more developed render engine and team to do these things :/