[galdosdi]

Mongo isn't the only bad one but it's kind of humorously become the canononical bad one -- where by "bad one" I mean the kind of NoSQL database you choose just because you don't understand SQL) and not because you have a specific scaling need. A good example of a NoSQL database you'd pick to help with write scaling might be Cassandra (which has schemas and is looking more and more SQL like these days with CQL -- the consistency and data models are just different to allow for writes to scale up)

Not saying Mongo doesn't have any legitimate uses (although I honestly suspect it doesn't, not even the ones listed at the end of TFA, at least not assuming the developer is already well versed in using a good relational database and related tooling. In fact I think I'd be willing to challenge and bet money against a mongo proponent to see who could create "an MVP on a super-tight schedule" faster.)