Just curious: what are the "bigger and better things" that have replaced XSLT? From what I can tell, it's still being used quite a lot, especially in the world of structured documentation. For something like transforming massive amounts of XML with a great amount of structural variety to another format, XSLT would certainly be my first choice.
I'd say a comparable new piece of technology is AngularJS + HTML + CSS with JSON as the data format. In the end you're still transforming an easily-exchanged data format to a visual display, but with all of the new things that come with Web 2.0 and the thick client model.
It still can't turn a pile of XML into a pile of PDFs though, so XSLT is definitely king in some arenas.
