Without schemata, you end up with spaghetti pretty quickly and no way to ensure data-quality. It's also impossible to treat segments of the graph as documents.

Without schemata, you end up with spaghetti pretty quickly and no way to ensure data-quality. It's also impossible to treat segments of the graph as documents. With a strong schema you can move seemlessly between objects and graph view. It is currently deployed in several industrial settings.