At this point I would not recommend using PIs for anything long running at all. I have two v3 and one v2 and all of them crashed at some point, one of the v3 was idle during that time.

The one PI I still run as build server operates of a write protected SD card and reboots regularly.

I am not 100% sure why the PIs crashed yet (still have to do the investigation), but if errors like this already show up in a server rack with AC attached I'm a bit skeptical.