And to be fair, YAML is somewhat clean for what it is. I shouldn't have included that in my rant either. My main gripe is with the "JSON Everywhere" approach. :)

There's no one-size-fits-all solution to anything. If one is using JavaScript—great, use JSON as a way to transmit objects over the wire or unpack an object into a template. Just PLEASE do not use it for a configuration format. Visual Studio Code configuration is a nightmare of ugliness.