… but vendors will fight you every step of the way.
Remember – every vendor wants to get as much of your data in their database as possible. And every data approach (Relational, Document, Key/Value Store and Graph) can be forced to do just about anything; and given the opportunity the vendor will tell you their solution is the right choice.
The challenge for the modern Enterprise Data Architect is maintaining a cogent point of view about assembling a polyglot solution to make each use case (or micro service) less complex, more scalable and easier improve/enrich over time.