For what its worth, Catalina has made my 2019 run slightly smother and less buggy. This might be because it reset all the preferences or its just in my head. All my "pro" audio stuff seems to work and my Apogee Groove works like before. My usb hub network port/driver would fail/crash randomly on Mojave needing a reboot but this has not happened on Catalina.

Edit: And someone else replied, the DPI/font stuff seems to be fixed as it was driving me crazy in Mojave. The upgrade is worth a try for that alone.