I took notes during the "What's new in managing Apple Devices" session. If interested, please see the attached "Notes from session": Notes from session For the session video, please see the following link: https://developer.apple.com/wwdc21/10130

Kernel extensionsProblems:Difficult to develop and debugStability problems for systemSecurity problems for systemIntroducing System Extensions and DriverKitNew as of CatalinaSimilar to kext, but runs in user space; outside the kernel.Network extensionsEndpoint Security extensions- Replacement for Kauth event monitoringDriver extensions- Control hardware devices- Uses DriverKit, which replaces IOKitDeprecating kernel extensions:macOS Catalina will be the last OS version to run kernel extensions without compromise.Installing third party kernel extensions on macOS Catalina now requires that you restart your Mac before they’re permitted to load.As System Extensions and DriverKit adds functionality, kernel extensions with matching functionality will not load.System Extensions- Always part of the app- No such thing as a "standalone system extension"- Distribute via the MAS or Developer ID (MAS deployment not previously possible with kernel extensions.)Sign System Extension with a Developer ID or MAS certificate- Developer ID for Kernel Extensions certificate is no longer required.System Extension with a Developer ID must be notarizedInstallation- No installer or package is necessary, System Extension is inside the app bundle.Use the new SystemExtension lifecycle is managed by the systemSystem Extension will be stopped and started as needed.UninstallationMoving app to the trash deactivates all of its extensions. No special uninstall process is needed.