I'm a friend of a friend so this is 2nd hand. There is no reason to be concerned. He was just frustrated with some things here on RFM and took a break. He'll probably be back at some point but likely under a different name.
Glad you posted this, PapaKen. I've been hoping for XYZ's return to RfM. He has a way of cutting through the detritus and getting straight to the heart of the matter with his hilarious posts.