Another unsung nicety related to this one is that you can fully update your system but only start using it once you reboot. Too many times I updated the kernel on Arch only to find everything stopped working until I rebooted, hence why routine updates can just be done automatically with no issues to the user.
Wasn’t there also very recently a whole thing about the single guy who maintains the NTP spec threatened to retire so he could get a “real” job, which caused a gigantic internet-wide panic as pretty much everything we do relies on computer’s clocks being perfectly synced?