I feel like the use case for it has really shrunk over the past 10 years. When it comes databases I most commonly hear customers split two needs/wants. 1) data

I feel like the use case for it has really shrunk over the past 10 years. When it comes databases I most commonly hear customers split two needs/wants. 1) data integrity (ACID). 2) Speed. When it comes to data integrity the obvious choice is to go with a SQL database like Postgres. When it comes to speed the obvious choice is go with a memory db like Redis. Mongo sits awkwardly in the middle where it isn't ACID compliant, and it isn't a memory db so can't outperform Redis. Another factor is that a lot of things have migrated to cloud managed db's, so if you need a document store, and are going to use a cloud managed db, then something like DynomoDB makes a lot of sense. EDIT: Apparently Mongo added support of multi-document ACID transactions back in 2018 https://www.mongodb.com/blog/post/mongodb-multi-document-acid-transactions-general-availability https://www.mongodb.com/blog/post/mongodb-multi-document-aci... . Who knew? Not sure why but when I think of a database that needs to be ACID, mongo isn't even on the list for me. Seems like just a misconception/myth on my part though.