I've only skimmed the quickstart docs https://kargo.akuity.io/quickstart/ but this snippet immediately clicks for me as something that I'd want to try

    cat <<EOF | kubectl apply -f -
    apiVersion: kargo.akuity.io/v1alpha1
    kind: Promotion
    metadata:
      name: prod-to-${FREIGHT_ID}
      namespace: kargo-demo
    spec:
      stage: prod
      freight: ${FREIGHT_ID}
    EOF

Have enjoyed using argo in general in the past, its got a great model for k8s native workflows / events but never got to using it for CD.