Seibel: I know Google has a policy where every new employee has to get checked out on languages before they’re allowed to check code in. Which means you had to get checked out on C.
Thompson: Yeah, I haven’t been.
Seibel: You haven’t been! You’re not allowed to check in code?
Thompson: I’m not allowed to check in code, no… I just haven’t done it. I’ve so far found no need to.
Peter Seibel, Coders at Work, Apress, 2009. Cited by The Register.