I worked for a local government in the early 90s. My swan song project was consolidating 50+ NetWare 3.11 to 6 production NetWare 4 servers. We repurposed the old hardware to run as GroupWise messaging gateways.

My most vivid observation was that we would periodically reboot servers just because they had been running steadily for over a year without problems or degradation in performance.

I still can't say that about any Windows product I've ever used, even to this day.