I agree- I was a huge fan of MongoDB when it came out because of the unique data structures it enabled easily.  However when it came time to select a new database for my new project, I found that the JSON support that PSQL had added gave me all the flexibility I needed while still in a somewhat relational form, and additionally it is dead simple to spin up postgres RDS instance in AWS, and it&#x27;s a pain to use Mongo there.