It's not just devops that you need to pull off a large monorepo; the other big thing is a strong testing culture. You have to be able to rely on unit tests from

It's not just devops that you need to pull off a large monorepo; the other big thing is a strong testing culture. You have to be able to rely on unit tests from across the code base being a sufficient indicator of whether your commit is good. AND a presubmit process that can compute which parts of the monorepo get affected by your diff, and run tests against them automatically before committing your diff. Google not only has the above but also has a strong pre-submission code review process which catches large classes of bugs in advance.