I work for a database company and of my ~100 customer meetings last year, only one of the notes mentions Mongo as software they use in production. Maybe it’s a different world or something, idk, but I don’t understand the use case.

If I’m ingesting unstructured data for search or “parse it later” purposes, I’ll choose OpenSearch (elastic). Otherwise I’m going PG by default and if I need analytics I’ll use Parquet or Delta and pick the query engine based on requirements.

I honestly cannot think of a use case where Mongo is the appropriate solution.