This makes no sense to me. Modern build systems have reproducible results based on strict inputs.

Modern CI/CD handles tasks that are not strictly reproducible. The continuous aspect also implies its integrated to source control.

I guess I don't understand the post if its not just semantic word games based on sufficient use of the word sufficient.

Maybe the point is to talk about how great Taskcluster is but the only thing mentioned is security and that is handled with user permissions in Gitlab and I assume Github. Secrets are associated with project and branch permissions, etc. No other advantage is mentioned in detail.

Can someone spell out the point of this article?