Same here. I pretty regularly use my 16” to play games and compile C++; I’ve never noticed the fans operating higher than normal. The author mentioned external monitors: I have it plugged into an LG27850-W (27” @ 4k UHD) and it’s never been a problem.

The one thing that does bother me: I have a hardware USB switch that Catalina doesn’t recognize properly (works fine on Mojave).