That seems to be exactly what they are planning... "Faster updates: Once macOS Big Sur is installed, software updates begin in the background and finish faster

That seems to be exactly what they are planning... "Faster updates: Once macOS Big Sur is installed, software updates begin in the background and finish faster than before — so it’s easier than ever to keep your Mac up to date and secure." https://www.apple.com/macos/big-sur-preview/ https://www.apple.com/macos/big-sur-preview/