either does not return :outputs

[flosell]

The either step does not return the step results of its children, making it harder to get data about them, e.g. when processing the information from :pipeline-finished events. It's also just not intuitive if some container steps return :outputs and others don't

[flosell]

Counterpoint: It currently doesn't return outputs because then it would need to wait for all children to finish/be killed to have a final result to return. Depending on the child step, being killed takes a few seconds so implementing this would mean slowing down the pipeline for more correct but rarely used data.