I doubt that for the simple reason that relational databases are maths: the relational algebra and relational calculus. There's no such theoretical underpinning

I doubt that for the simple reason that relational databases are maths: the relational algebra and relational calculus. There's no such theoretical underpinning to object databases. True, the relational architecture is moved to the object or code level, if you think about it in relation to size, it makes more sense there for the future. The RDBMS was the brain but it is also the storage, code will now dictate how to use the storage and not the storage itself, the storage is becoming a component.