(author of Dgraph here) There're a bunch of changes you can do in Dgraph, that're very convenient. For e.g., going from 1:1 relationship to 1:many relationship

(author of Dgraph here) There're a bunch of changes you can do in Dgraph, that're very convenient. For e.g., going from 1:1 relationship to 1:many relationships (see my comment about movies and directors). Having sparse data models and such. Then, able to change from int to float, to date -- all these constitute a flexible schema that something like Dgraph is built around, and an relational DB is not -- which all make it easier to iterate upon data models, way better than what relational tables can give.