The new Catalina update in now available. However, I

I have received a lot of warnings that much of the non-Apple software I have on my computer will not work on future Mac OSs. I assume this means Catalina. I use a LOT of this software on a regular basis, including RealPlayer, Audacity and Google Earth, amongst others. Have these issues been dealt with, or should I just hold off on updating to Catalina until after they are?