No. Incorrect on all levels. You can do declarative with both, or take a procedural approach with both. You can use SQL or Datalog with both. You can create views with both, materialized or otherwise. Graphs have never been obsolete. Graphs and the networks they represent are the foundation for some of the most sophisticated algorithms we know.
4 decades ago, mate. 4 DECADES AGO. Relational replaced graph 4 decades ago because graph lacked all that functionality 4 decades ago. And that it took 4 decades for graph to merely level up (and mostly by mocking relational-ish behaviour at that) is only telling of how advanced relational has always been.
(And pls note carefully that I didn't say graph was obsoleted as a mathematical theory. What I did say was that graph was obsoleted as an appropriate mathematical theory * for underpinning doing data management with it *.)
It should not even take half a brain to understand why [pseudo-]relational replaced and obsoleted graph 4 decades ago.