Still using both of mine. I have the one that lives in the Argosy desk and the other that lives in a rack case.

With respect to 11R and Catalina; since I've never used 11R as my interface, I've had relatively few issues upgrading to Catalina.

I've always used 11R as a guitar processor with either Avid 003 Rack + or my current Focusrite Clarett 8PreX via S/PDIF, or anolog.