> want to load config from environmental variables or centralized config management tools. I am not sure I understand this, I have a feeling you are mixing "co

> want to load config from environmental variables or centralized config management tools. I am not sure I understand this, I have a feeling you are mixing "configuration" with "loading the configuration" here which is a slippery slope. > you miss out on the benefits of your first language, like static typing Again, you are confusing configuration with writing your application. You have a point here if you are your applications only user (e.g. server apps) and you have to recompile anyway. > Third, you can do things like merging environment-specific configs into a base config Again, I am not sure if your config file is the place to do that. I would argue that your configuration should be different in different environments instead of having a smart configuration that recognizes the environment and does a bunch of different things. > or programmatically filling in an array of values explicitly and in a way that's easy to follow. This is also a good point and is definitely a place where JSON falls short. Good stuff.