story
That's mental.
Ideally you'd never upgrade your software in the usual way. You'd simply deploy the new version with automated tooling and tear down the older.
Also, "running a server for ten years" does not need to mean that it has ten years of uptime. I think that wasn't meant.
If it is connected to the Internet, then I guess the kernel needs to be hot-patched need to be applied to avoid security issues.
Were hot kernel patches available ten years ago? I remember some company who did this (for Linux), and it was quite a while back, so it's possible. But I doubt it was mainstream.
I recall long ago that SunOS boxes had to be rebooted for kernel patches.
I don't remember about Solaris.
I'm not familiar with other Unices.
Do you have any idea how much effort it is to change everything over to "treating your servers as disposable"?! It's going to eat up a third (to half) of my "fun time" budget for the foreseeable future!
the 'usual way' is automated tooling
