Oh, ok. In my case some of my servers are over 20 years old, though I run less critical services on them. My newest machines is about 4 months old. My buddy in the rack next to me is a few servers from the same batch as my 20 year old ones. Obviously the most critical stuff runs on the newest hardware but when you’ve had a machine running uninterrupted for a decade or so why mess with it? Annualized cap ex + the op ex is negligible at this point.

As personal servers of course “critical“ is pretty idiosyncratic, though I have used them to start and host various companies overnthe years until it was worth giving them their “own” hardware and identity.

I admit the age of managing a rack full of servers in a colo has largely passed.