Yep, or you need to build some other construct to support it (IE: keeping running tallies and the like). It's a tradeoff between the benefits of the document s

Yep, or you need to build some other construct to support it (IE: keeping running tallies and the like). It's a tradeoff between the benefits of the document store vs the loss of relational data. The blog author here clearly didn't understand the trade-offs he was making. As always with these discussions: it's important to use the right tool for the job. I'm a big fan of what Mongo is doing. I've used it two higher scale projects and have no complaints. Of course, I'm using it in the context for which Mongo excels.