I don't think the document addresses key issues with Mongo: Poor technical implementation. There are countless stories of odd performance issues, occasional da

I don't think the document addresses key issues with Mongo: Poor technical implementation. There are countless stories of odd performance issues, occasional data loss, and similar. postgresql can handle JSON documents with none of that and better performance. If you're not doing a lot of relational work, relational databases shard really nicely for arbitrary scalability. etc. I love the concept of Mongo, but when I used it, I found it unusable. I switched back to relational databases as well as S3. On the whole, it just works better.