Fascinating read. Those suggesting Mongo are missing the point.

The author clearly mentioned that they want to work in the relational space. Choosing Mongo would require refactoring a significant part of the codebase.

Also, databases like MySQL, Postgres, and SQLite have neat indexing features that Mongo still lacks.

The author wanted to move away from a client-server database.

And finally, while wanting a 6.4TB single binary is wild, I presume that’s exactly what’s happening here. You couldn’t do that with Mongo.