CI systems are important to me, but my requirement is pretty much: Can it run a bash script. Every CI I've ever used has degraded into a bash script runner. It starts out well enough, you try to use all the build in features but at some point you fallback to running a shells script and then slowly more and more move to the script, because it's easier.

Someone should just build a bash CI, something that can manage secrets and then run one or more shells scripts.