[robinwassen]

RMDBs often has great schema migration tools which usually are no problem to use on small datasets.

NoSQL often rely on handling difference in the data model in the application layer, which can become messy and cumbersome if you switch a lot of requirements.

[geophile]

Well, they rely on doing pretty much everything in the application layer, which can become messy and cumbersome. Relational databases are the way they are for a reason. NoSQL is often selected, not because they address requirements better, but because developers are not even aware of the problems that relational databases solved years ago.