The trade-offs involved in using abstracted data inrelationaldatabases versus non-abstracted data in non-relational databases, relying on pre-abstraction versus self-abstraction of high-volume data streams, and so on are not obvious, will change as technology involves, and will depend on the company and the problem.
For example, most organizations have their data in structured relationaldatabases like Oracle, but much of the data generated today is unstructured, high-volume web data or machine data.