title: NoSQL-agnostic persistence layer
body: <p>It seems to me that, at the end of the day, most NoSQL databases are at their core key/value stores, which means one should be able to build a layer which could be NoSQL database agnostic.</p>
  
  <p>That layer would only use CRUD operations (put, set, delete), but would expose more advanced features, and you'd be able to switch with minimal effort  the underlying DB whether it's Mongo, Redis, Cassandra, etc.</p>
  
  <p><strong>Would building something like this have value to many people, and does it already exist?</strong></p>
  
  <p>Thanks</p>