Offhand, YAML is non-printing-space sensitive, while JSON is not (it's syntax sensitive though). Looking it up, tabs are not supported, which is a HUGE determe

Offhand, YAML is non-printing-space sensitive, while JSON is not (it's syntax sensitive though). Looking it up, tabs are not supported, which is a HUGE determent for my use cases. (I'm nearly religious on loving tabs and user defined width of single character indent levels.) A minor change of nesting is easy to accomplish in JSON, while YAML practically requires support from a text editor. JSON _can_ be rendered in a pretty print fashion for easier human editing, and it should still parse correctly irrespectively of how additional non-printing-space is added.