Earlier quoted context omitted.
I've heard that before... https://en.wikipedia.org/wiki/XSLT
Isn't the Blizzard website largely written in XML and XSLT? I can imagine quite a few scenarios where that can be a good approach.
The WoW Armory website used to be written in XSLT on top of a horrendeous java stack. It's commonly referred to as the badmory and was slow as all hells. It had a pure-html fallback (rendered serverside into html) for unsupported browsers. It's one of the worst pieces of web I've ever seen... and I've seen some stuff.
It's no longer using all this, of course. They hired the guys from wowhead.com and had them redo the whole thing in a saner stack.