Object-databases are used very seldomly, albeit they offer a way to live without SQL, which is, I think, a benefit of its own.
Yet, I have seen them about never in production systems. Is there something fundamentally wrong with object-databases? Can I use a object-database in a production system?
Edit: So, maybe I should confess that I love object-databases. I cannot really get my head around why they are not used a lot more often.
Sure you could, as long as it was stable. The problem is the relative lack of high quality Object Oriented DB systems, as well as the fact that most people don't even know what one is.