That's a pretty accurate summary. Documents are very straightforward to reason about at a transactional level, particularly when handling unpredictable changes

That's a pretty accurate summary. Documents are very straightforward to reason about at a transactional level, particularly when handling unpredictable changes to data models. Once documents are ingested into the EAV-like indexes you can query everything much the same as a typical graph database, because all the ID references within the documents translate into edges within a schemaless graph of entities. Crux's native query language is a flavour of Datalog but we also have a SQL layer in the works using Apache Calcite, for a more traditional relational feel.