As a Mac user I am always brave to upgrade to the newest OS version. I never had problems with it.
But: the jump to Catalina (which stops support for 32bit Applications) is a radical one (for that very reason).
I have some older software which I love and need, also drivers for scanners etc. which are still 32bit.
For this reason I’ll freeze my update routine for the moment and will withstand to jump onto the Catalina waggon…