NoSQL in general is a niche tech. Data is inherently relational. It is very hard for me to imagine a situation where basing everything on Dynamo or Mongo is the

NoSQL in general is a niche tech. Data is inherently relational. It is very hard for me to imagine a situation where basing everything on Dynamo or Mongo is the correct move, vs. only using NoSQL in specific problems that make sense. Dynamo and mongo generally smell of developers enamoured with specific tools over solving problems efficiently.