Why is there an "S" in XSLT?

["Costello, Roger L." <costello@mitre.org>]

Hi Folks,

The "S" in XSLT stands for "stylesheet."  But in modern web design
practices styling a document (i.e., adding text color, font-size,
borders, and so forth) is accomplished using Cascading Stylesheets
(CSS).  

The niche that XSLT occupies is the "T" part - transforming XML
documents (i.e. tearing an XML document apart, rearranging its parts,
merging parts, and some processing of the data).

Shouldn't it really be called XLT (XML Language for Transformations)?

/Roger