You raise another good point which I didn't even consider. When I upgrade my Linux computers, I can more often than not continue working like nothing is happeni

You raise another good point which I didn't even consider. When I upgrade my Linux computers, I can more often than not continue working like nothing is happening, while the installation finishes. Only issue is nvidia drivers which require a reboot after finishing the upgrade, otherwise applications like Alacritty doesn't open anymore. Usually I work around this by upgrading everything but nvidia the first time, then do the nvidia update separately. And once full update is finished, you do a normal reboot and everything is complete. But with Windows and macOS, you're dead in the water while the process is being done, so even if you wanted to, you couldn't continue working.