Umbrella chart is evil
Helmwave is only what you actually need.
Why Umbrella chart is evil?
- You must keep extra chart.
 - You have new layer for conventional values.
 - Umbrella chart doesn't provide separate your environments.
 - When sub-chart modified you need fix it twice.
 
Suppose that you need to describe next architecture.
graph LR
              frontend --> api --> rabbitmq & minio_s3
              consumer --> rabbitmq & minio_s3 & postgresql
            
            helmwave.yml
version: 0.25.0
repositories:
  - name: bitnami
    url: https://charts.bitnami.com/bitnami
.options: &options
  namespace: stage
  wait: true
  max_history: 5
releases:
  - name: frontend
    <<: *options
    chart: charts/frontend
    depends_on:
      - api
  - name: api
    <<: *options
    chart: charts/api
    depends_on:
      - rabbitmq
      - minio
  - name: consumer
    <<: *options
    chart: charts/consumer
    depends_on:
      - rabbitmq
      - minio
      - postgresql
  - name: rabbitmq
    <<: *options
    chart: bitnami/rabbitmq
  - name: minio
    <<: *options
    chart: bitnami/minio
  - name: postgresql
    <<: *options
    chart: bitnami/postgresql