I was out of the country and as a result my Windows 10 based server was on without a reboot for months. 5 months. I was rather stressed about it as I've never tested Windows 10 that long, but it did make it. During this time it was running as the house server and running some file management programs written by Sinner Computing and yeah... I got back and it was all running fine. Explorer had crashed and but it was all fine.
(Why no auto-reboots? 'cos I've blocked them. Why? My current server has a 8 bay external USB SATA case and it is a bit flakey. On reboots often a drive or two is "missing". This issue should be resolved by my new server.)
Despite the negativity surrounding Windows it's core is pretty solid. All the crap that runs on top, not so much. Windows Explorer is part of that sad to say.