I am surprised that the "Postgres supports JSON so we don't need NoSQL systems" talking point is so common on Hacker News. MongoDB's marketing department is par

I am surprised that the "Postgres supports JSON so we don't need NoSQL systems" talking point is so common on Hacker News. MongoDB's marketing department is partially to blame for this because they marketed the negative trade-offs of MongoDB like non-SQL querying and lack of schema as "intentional" features. It was Google's BigTable paper (2006) and Amazon's Dynamo paper (2007) that led to the "NoSQL revolution" in the late 2000s. The goal was to make it easier to scale a lot of de-normalized data horizontally with the tradeoffs being lack of RDBMS-like querying and schema enforcement. In hindsight it was bizarre to market a whole category of horizontally scalable data systems based on one of their main negative trade-offs: Lack of SQL querying. Since then many of these data systems have added SQL-like querying.