I read LC and enjoy his information, but he is indeed very opinionated and he seems to be on a huge rant about Catalina. I think there is a world of difference between using a trashcan Mac at home, connected to a couple of external drives, and practicing your photography hobby, and being a professional with many state of the art devices and pushing the performance to the extreme, which is what I am imagining he is doing. Yes, there are undoubtedly problems with Catalina, but as we all know people using it successfuly don't write the forums. I too have a 2013 MacPro, connected to two external drives, and I use Catalina and have had no problems. I do worry that the move away from Intel base CPUs will decrease the amount of future time Adobe products will be supported on my mac.