But it's dead format! Nobody do not use it. JSON easy to read, there is a lot of it's checkers and formating tools.I find the SDLang format much cleaner to use than JSON
Yes, it's not perfect, but now it's _standard_. Personally I'd prefer yaml, because it's much easier to read for humans.
But what we will do with SDL? Who know how to parse, validate it with D, and with another language? Even ini is better, because everybody know it.