Shallow. Especially “ The era of XML is in the past… now it's dead.”

That’s not an argument against the merits of XML, it’s just a fashion declaration.

It’s also wrong. Podcasting boils down to XML files. It even heavily uses XML’s extension mechanism. XML is the basis for RSS and Atom. XML is the basis for LibreOffice and modern Microsoft Office files. XML is at the core of the epub digital book standard. And on and on.

XML may not be ideal for config (reasonable people can disagree on the topic) but it’s not dead.

It’s also interesting that he declares JSON “won” then adds a bunch of XML features to it like ordered entries and not having to quote element/attribute names.

JSON “won” for web apis - e.g. browser-server data interchange. It is not, and was never claimed to be, good for serial documents like config, or for when you need an extensible format (the “X” in XML). It’s fine for what it is, and so is XML, which, when it “won”, was similarly overused, like for web apis.