[Snappy]

> For one of the software projects I'm involved in, I have more complex needs. We release binaries for multiple platforms so our Jenkins master delegates certain tasks to slaves running on specific OSes. Then at the end the Jenkins master downloads the built artifacts from all slaves and publishes everything to our artifact hosting server. As far as I can tell, Gitlab CI does not support this.

GitLab CI/CD can certainly run jobs on different OSes, then have a final job consolidate those artifacts and publish to an artifact server. What part can't GitLab do?

> In future CI jobs I may even require user interaction, e.g. I may ask a human to sign off a report. I don't think Gitlab CI can do this.

GitLab CI/CD has manual jobs so a pipeline can wait for human sign off before proceeding.