XML is incredibly powerful, somewhat complex, and therefore misunderstood.
It needs an "Modern XML" like the "Modern Perl" that's going around - a take from someone who has used it to solve problems and goes over the bright points and black marks.
For example, to the neophyte, do you pick DTD, XML Schema, RelaxNG, or Schematron to solve data validation task X? How about task Y?
Too many people tried to use XML as a CSV or other structured data replacement, where JSON is usually superior. I doubt that anyone thinks that JSON is a HTML replacement, but XML can be.
It comes down to different tool, different job, and using the wrong tools can leave a sour taste in one's mouth about a technology - how many people here have similar feelings about Java or Windows?
