If you run all of your code in one datacenter, and it never talks to the outside world, sure. That is a fairly rare usage pattern for production systems at Goog

If you run all of your code in one datacenter, and it never talks to the outside world, sure. That is a fairly rare usage pattern for production systems at Google, though. Just like anyone else, we have packet drops and congestion within our backbone. We like to tell ourselves that the above is less frequent in our network than the wider internet, but it still exists.