Being as most of the technology in use today is based on standards, most notably the ones maintained by the W3C, and the evolution of standards being quite slow, there has always been a community of developers that aim to force evolution by building tools on top of existing antiquated technologies.
Generating CSS and JavaScript code has been around for quite some time now, and has become somewhat of an industry standard. Using the latest tools to generate code allows us to manage and build our web applications faster than ever before. We can now make use of more modern language features in our code, and we can finally make use of our programming skills to generate our CSS style sheets.