> In the olden days I used to cross my fingers when rebooting spinning disk servers with very long uptimes because it was known there was a chance they wouldn't come back up even though they were running fine.

HA! Not just me then!

I still have an uneasy feeling in my guts doing reboots, especially on AM5 where the initial memory timing can take 30s or so.

I think most of my "huh, its broken now?" experiences as a youth were probably the actual install getting wonky though, rather than the few rare "it exploded" hardware failures after reboot, though that definitely happened.