What benefits? They're completely different technologies. They share very few characteristics, and many apps which are built on SQL using the ORM would not "just work" on a NoSQL engine.
You also are only talking about MongoDB. Who cares about MongoDB? Maybe you do. What about the guy using Cassandra? Or Redis? Or Couchbase? etc etc etc
They all have very different properties, and the only thing they have in common is that they store data, and some of them allow you to query on the data.
You also are only talking about MongoDB. Who cares about MongoDB? Maybe you do. What about the guy using Cassandra? Or Redis? Or Couchbase? etc etc etc
They all have very different properties, and the only thing they have in common is that they store data, and some of them allow you to query on the data.