[wvenable]

I've been in the opposite situation and I couldn't disagree more. But I will say this, it's always possible to take an RDBMS model and de-normalize it and use it like a NoSQL database (like reddit does, for example) but it's not possible to go the other way.

[lloyd-christmas]

> but it's not possible to go the other way

Why not? We do exactly that. We prototype in mongo and then migrate to postgres when we're comfortable with where the app is headed.

[wvenable]

I don't mean it's possible to use a different technology; I mean within the same technology (postgres, for example) you can use it both as a normalized relational database and/or as a de-normalized document store.