ECK YAML examples for production-grade deployment

Hi, would appreciate some response here.

I could use the official helm charts but
https://github.com/elastic/helm-charts#eck says that ECK is now the Elastic recommended way.

But the example given here (https://github.com/elastic/cloud-on-k8s/blob/master/config/samples/elasticsearch/elasticsearch.yaml) is not close to production. The helm charts are better in that regard.

Considering future prospects, should I go the ECK route or helm charts is fine? Thanks.