It simplifies your code that depends on configuration. Instead of having to parse the config language you just read the JSON. Pretty much every programming la

It simplifies your code that depends on configuration. Instead of having to parse the config language you just read the JSON. Pretty much every programming langauge has a JSON parser built in to its standard library, while support for higher level config langauges is a lot less ubiquitous. It also makes it easier for other tools to generate, validate, or output config that feeds into your system. They can do whatever processing they want and emit plain old JSON.