Bloody bargain, well done mate, I’m quite jealous after spending a fortune on lots of new kit when I probably should’ve looked more at older stuff like this.

Whenever they’ve been running from UPS battery for more than a few minutes or for hardware maintenance/repair, otherwise they run 24/7

Just be mindful that for Plex that chip has no iGPU (unlike some Xeon CPUs) so will not have QuickSync for better hardware transcoding. Also Xeon class systems tend to consume more power and electricity bills are a little higher than they were over 5 years ago. Having said that, I’ve been running a Kaby Lake based NAS from brand new and it’s been a great little workhorse, with over a dozen containers running 24/7 sharing only 4 threads!