Thank you, the design you described look natural to me, but I don't understand how this reduces the complexity coming from having lots of objects. If I underst

Thank you, the design you described look natural to me, but I don't understand how this reduces the complexity coming from having lots of objects. If I understood you correctly, repository abstraction hides only one object - a Cassandra or MongoDb repository. Don't get me wrong, I'm not attacking your point (in fact, I think we most likely would agree on almost everything), I just don't understand what you mean.