I mean, if you're Google, and a small improvement in algorithmic efficiency means needing a thousand less servers, yes, you want people who know that kind of stuff like the back of their hand. Most places aren't Google, though. Places that interview like Google that don't have Google-like problems have a mis-fit between their interview process and the roles they are interviewing for. So, places that aren't really on top of what they're doing as an organization.