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You're the reason why I inherit project that uses only ES and then end up doing relational schema in ES because they didn't use relational database in general.

If you had to choose between PostgreSQL or ElasticSearch then you have no idea what you're doing.

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I recently interviewed at a startup that explicitly uses both, with PG being something of an authoritative backend store that feeds into ES as the primary frontend store (since the frontend is search-heavy).

It might be possible to get it to work without PG, but I imagine it would require a huge engineering effort (akin to an entire product on its own, which, IIRC, is what CrateDB is).

(Although I believe I understand your point, I fear that your tone and ad-hominem language detracts from it).

https://github.com/zombodb/zombodb works for me by turning Elasticsearch into an index type (PG10 only)

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