In the context of this conversation, I assume we're talking about a single data store for all of an apps data needs. However, I'd argue in more modern applicati

In the context of this conversation, I assume we're talking about a single data store for all of an apps data needs. However, I'd argue in more modern application (newer) that one would design with a couple different data stores. using NoSQL for true data that can't be definied by a schema, and then the traditional RDMS when both ACID and schemas are needed. And then, there's several other types of data stores in between.