So, we do ~daily restarts on our customers' systems. We have a solid 12 hours per day to patch up a server before it needs to be in production again.
That said. We communicate directly with other systems on the same premises that probably haven't been rebooted in over a decade.
Building something that can run 10 years without downtime is not happenstance. It is very intentional and deliberate engineering.
Re:Kubernetes is our generation's Multics
by fxtentacle on Thursday July 22, 2021 @07:02AM
(#27917489)
https://en.wikipedia.org/wiki/Kpatch
Allows you to patch the kernel without reboot.
That's not actually something to brag about, as it implies they weren't receiving important kernel updates, particularly security updates.