Not all problems are technically suitable for a NoSQL database. You might as well say "I'm a big fan of JSON, but not all problems are technically suitable for

Not all problems are technically suitable for a NoSQL database. You might as well say "I'm a big fan of JSON, but not all problems are technically suitable for a NoXML data format." There's nothing magical about SQL, as proven by the fact that so few apps actually use its abstractions! The reasons to use SQL today are pragmatic; battle-tested engines, tools, etc. Most developers will never write their own ORM or database, but the ones who are up to it are starting to explore the design space quite profitably.