My late 2017 21.5 inch iMac (with the OS living on a 1 GB card in the processor direct slot) and my 16” Intel MacBook Pro are still on Catalina. All this stuff and simultaneous multi-device updates because of an apparently exploited WebKit vulnerability make me wonder whether it’s finally time to update to the current macOS, since no updates to macOS were released with this wave. Anybody know?