Hmmmm ... According to
Oracle: "Eventually (as of January 2020), you will only be able to install and run Mac software distributed outside the Mac App store on macOS 10.15 systems that are notarized by Apple."
This is consistent with
Apple's Sept 3 statement: "Mac software distributed outside the Mac App Store must be notarized by Apple in order to run on macOS Catalina. To make this transition easier and to protect users on macOS Catalina who continue to use older versions of software, we’ve adjusted the notarization prerequisites until January 2020."
This is a bit in contradiction to
Apple's Oct 7 support document providing instructions to override Gatekeeper and run unsigned/unnotarized apps.
I suppose we just have to wait until January to see if Apple is indeed going to close the door to unsigned/unnotarized apps
