The article talks about _how much_ it is faster which is the interesting question.
For a small project you might not want the added complexity of another database and decide to store JSON blobs in PostgreSQL. In this case it's important to understand the performance trade-off you're making.
For a small project you might not want the added complexity of another database and decide to store JSON blobs in PostgreSQL. In this case it's important to understand the performance trade-off you're making.