I'm very familiar with the history of CI platforms before GitLab, having used Hudson, Jenkins, Circle, Travis, Appveyor, Codebuild, and a whole bunch of other p

I'm very familiar with the history of CI platforms before GitLab, having used Hudson, Jenkins, Circle, Travis, Appveyor, Codebuild, and a whole bunch of other platforms extensively. While some of them had these features, none of them had all of the features, few of them meaningfully integrated the features together, and most of them provided the features in a very half-assed and unreliable way.