This is a good comment. I first got excited about Riak because I'm an Erlang programmer (hence why I knew about it) and tried to build a side-project web app using it; only to realize Riak is poorly suited for the type of task where you need anything remotely resembling the relational model (and all of the tools that come with it).
It hasn't been until two years later that I've actually found a need for it - it handles very specific pieces of our data model that grow rapidly and doesn't need to be queried or indexed in any complex manner. We still use a relational database for user records, profile records, transaction records, etc...
It hasn't been until two years later that I've actually found a need for it - it handles very specific pieces of our data model that grow rapidly and doesn't need to be queried or indexed in any complex manner. We still use a relational database for user records, profile records, transaction records, etc...