[emperorcezar]

NoSQL is a catch all term. There is a place for key/value, document, graph, etc databases.

People got all excited cause they discovered that these exist. They've been around for a long time.

Relational DBs are a good default, but there are plenty of cases in which you'll use another type of DB.

Engineers need to stop trying to find a silver bullet.

[mmt]

They also exist as features within an (otherwise) relational DBMS. Perhaps the trouble is that it's mostly been in the realm of the commercial ones and only relatively recently has Postgres started adopting enough of them to make the notion popular.