At enterprise scale, on-call engineers may have to troubleshoot outages in systems whose original developers are gone and whose runbooks are outdated.

“That's, that's right. That's, yeah, that's, that's the scariest thing. That's, that's absolutely right. It's, it's like, it's... And, and then you're, you're the person, you know, you're the person who's on call, and you're interacting with a system that goes down where n- that person still isn't there, and there's, like, old, out-of-date runbooks, and you're like, "What the hell is going on here?"”