Hello! I am the author, and no, I haven't tried Catalina because, as I state at the very end of my article:

"Both my main Macs are really working flawlessly at the moment, and Catalina is beta-quality software that’s likely to give me headaches I don’t need right now. Who knows, maybe down the road I could acquire a cheap used Mac that can run Catalina (something like a 2014 Mac mini) and use it as a test machine. As things are now, I absolutely do not want Catalina to mess with my current setups and data."

I'll add — I'm in a position (work-wise) where I can't afford to risk Catalina messing with my current setups and data.