Sure, but the page itself says, that it's mostly based on some uncommon features. Since we are converging to the feature list of XML/WSDL with JSON, what makes

Sure, but the page itself says, that it's mostly based on some uncommon features. Since we are converging to the feature list of XML/WSDL with JSON, what makes you think that some JSON (i'm using JSON as placeholder for the next big thing in the JSON space) parsing libraries won't have bugs? Isn't that the danger of the added complexity? So, most likely some of those uncommon features won't be added to JSON but why didn't "we" as a community then not "just" invent "XML light" or disable those dangerous but sometimes used features behind better defaults? So, over the years all i've seen is some mumble jumble over how XML is too complicated and too noisy and big, atleast i used to say that, but what if that complexity came from decades of usage, from real requirements? Why wouldn't we arrive in the same situation 10 or 20 years from now? And if size matters so much, why do we ship megabytes of code for simple websites? And why didn't we choose protobuffers over JSON? And what makes you think that the next generation won't think that JSON is too complicated (because naturally, complexity will increase with new requirements and features). So, i suppose we'll see a JSON replacement with different brackets ("TOML Schema"?) in the future. Or maybe it's time for a binary representation again, just to be replaced with the next "editor friendly and humanly readable" format. It all feels like, we as an industry took a step backward for years (instead of improving the given tools and specs) just to head to the same level of complexity all the while throwing away lots and lots of mature tooling of XML processing. P.S.: Same goes probably for ASN.1 vs. XML Schemas... So now we are in the 3rd generation of schema based data representation: ASN.1 -> XML -> JSON.. P.P.S.: I'm not arguing that we all should use XML now, i'm reflecting over the historical course and what might be ahead of us. Clearly, XML is declining steadily and has "lost".