As an outsider without any knowledge of the company infra: 1) I wonder if they so many layers of CI/CD and testing, that the whole pipeline, even rollbacks pro

As an outsider without any knowledge of the company infra: 1) I wonder if they so many layers of CI/CD and testing, that the whole pipeline, even rollbacks probably re-run their tests which takes time. Are CI/CD runners the problem or it is something like network/DNS thing? 2) What if someone inside Cloudflare glibly yells "Why can't we just rsync our code to all data centers in less than a minute?" What would be the pushback this person would get? Why is it a stupid suggestion? Answering that would reveal some crazy layers of abstractions that get piled up in large companies.