[tok1]

No disagreement in general, but to your point of infrastructure routers (assuming you refer to ISP and Internet backbone infrastructure):

Having worked in ISP security, IMHO a years-long uptime of such critical components is nothing to be proud of (anymore). Quite the contrary, those are complex components, so if you care about security you have to regularly patch them, including occasionally required reboots. Just look at the list of security advisories of relevant vendors (Cisco, Juniper, Nokia/Alcatel-Lucent, etc), you can find scary vulnerabilities! Granted, "rebooting" a core router is more nuanced than a regular PC (you can e.g. reboot one management engine of a pair; or just a line card; etc), so it does not always mean that the entire traffic stops because of it.

Oh and btw. your network design should be able to cope with such necessary reboots, otherwise you have a single point of failure.

Regards