As far as i can tell, NoSQL is a reasonable way to store data that would otherwise go in a directory of files. If the lookup is anything more complicated than

As far as i can tell, NoSQL is a reasonable way to store data that would otherwise go in a directory of files. If the lookup is anything more complicated than "I know exactly which file I want because I saved the relevant key in a real SQL database," then you're probably doing something wrong. Too many people start with NoSQL because "we gotta be cloud scale" without actually thinking about their data model, don't want to redo everything the first time they realize they need to do a join, and end up bolting on a slow, broken, inconsistent query system on top that ends up being orders of magnitude slower and more expensive than postgres running on a laptop.