It's not just ORM. Many NoSQL databases allow for real-time events (query subscriptions), a simple security model, built-in data versioning, built-in sharding.

It's not just ORM. Many NoSQL databases allow for real-time events (query subscriptions), a simple security model, built-in data versioning, built-in sharding. You rarely get any of that out-of-the-box for a traditional RDS.