The issue I have with UI replacements is that I now have a dependency that MUST be installed, otherwise I have to learn how to UX again from scratch. If I ever get a new Mac, I now MUST install boringBar, otherwise it will be like learning a new OS workflow, akin from switching from Mac to Windows. If Apple ever updates anything to where the plugin would stop working, I now need to do the same adaptation. It's fun for a while to do things like this, but in my older computing age, I can't bear the cognitive effort, so I tend to just use mostly-default UI.