Like kyrra said. Releases are handled by independently by each team. Teams are in various states of maturity in relation to their release practices. Some are f

Like kyrra said. Releases are handled by independently by each team. Teams are in various states of maturity in relation to their release practices. Some are fully automated. Some involve manual QA. I've supported teams across that continuum as a SETI at Google. I'm not as well-versed in canarying though I've set it up for a team or two. I've only ever seen a single canary version for any particular binary. Canarying is done. I haven't seen canaries running multiple versions of the same binary. Though teams will often guard new behavior behind experiment flags.