It's not like Catalina is not having it's own issues right now... https://mrmacintosh.com/catalina-10-15-7-update-accountsd-us...
Kernel
Available for: macOS High Sierra 10.13.6, macOS Catalina 10.15.5
Impact: An application may be able to execute arbitrary code with kernel privileges
Description: A memory consumption issue was addressed with improved memory handling.
CVE-2020-9859: unc0ver
Apple issued a new Full Installer app, Combo and Delta Updates.
https://mrmacintosh.com/macos-2020-002-security-updates-moja...
macOS Catalina 10.15.5 Update Security Update for Mojave 2020-003 Security Update for High Sierra 2020-003
Patch & Security information, Download Links, Version info + size for BridgeOS, Combo, Delta, Full Installer app included in the links below!
https://mrmacintosh.com/whats-new-in-the-macos-catalina-10-1...
https://mrmacintosh.com/10-15-4-supplemental-update-bricking...