Yes, but it only works if absolute-goddamn-integrity is not a concern.
We unfortunately inherited a cluster from someone who thought it would be appropriate as a SoT for forensic data, which causes me no end of grief.
Elastic maintains a page documenting the current status of their "resiliency" efforts on Elasticsearch:
https://www.elastic.co/guide/en/elasticsearch/resiliency/cur...
ElasticSearch doesn’t have adequate data integrity to treat it as a primary data store for most use cases.
Do people use ElasticSearch as a primary data store? In my limited experience implementations don’t treat it as the source of truth.