I'm not the person you're replying to, but what annoys me about this on Fedora is that I use full disk encryption in my notebook, so I need to type the password after the reboot for the updates and then one more time to get it running again. I wish it could deactivate all services and somewhat return to a state similar to early boot in order to apply the updates, rebooting only once afterward. This would be especially useful for shutdown updates, in which case no password would be necessary.

I was hoping that systemd's soft reboot function would help a lot here. It would make it unnecessary to request password when using full disk encryption and would require less downtime. Last I checked it didn't work in Silverblue though.