Hm, just adding that my venerable SUN SPARC UII runs WEB server, ssh, web
proxy, sub-version, and is my "cloud" via rsync and of course serves email.
Over the last 7 years it got rebooted only twice, because the provider needed
to relocate it in the server farm and during one of these reboots we replaced
a failed disc in the array. I am pretty sure it would have ran without reboot
the full 7 years with one good disc left...