This was a fun read, a few additions: "Everything fails, all the time" --Werner Vogels, CTO of AWS. They are in a code freeze right now. Which means they're

This was a fun read, a few additions: "Everything fails, all the time" --Werner Vogels, CTO of AWS. They are in a code freeze right now. Which means they're not changing the system. And as every SRE learns in SRE Kindergarten, the biggest cause of failures are system changes. And a common lesson I learned was that the biggest problem with code freezes was that everyone starts shipping code when they get back. And that bulk set of changes causes increased risk to the system.