To be fair, I've seen both a Windows NT 4.0 server, and a Debian server (not sure about the exact version) with several years of uptime. But these days, with ev

To be fair, I've seen both a Windows NT 4.0 server, and a Debian server (not sure about the exact version) with several years of uptime. But these days, with everything connected to the Internet, one usually wants to install updates regularly, which often requires a reboot. Also, once the OS goes out of support, it's prudent to upgrade or get a new server altogether.