When I read something like this, it makes me wonder why I stuck with High Sierra so long, the longest of any Mac OS. I'm still going to do Mojave, but Catalina looks like a tightrope walk even at this point, especially for a Mac Pro 4,1 even with the 5,1 firmware installed and all the WIFI and bluetooth and SSD upgrades. Seems way too risky if supported machines are this poorly supported. This is going to be Tim Cook's legacy. Bean counter who let software development falter under his watch.