You can't write a server-side implementation of canvas or AJAX either. ^_^ It is possible to create a polyfill for CSS variables if you use JS as well. You ca

You can't write a server-side implementation of canvas or AJAX either. ^_^ It is possible to create a polyfill for CSS variables if you use JS as well. You can do a mostly-working one relatively easily that covers the simple, static case (where vars aren't changed dynamically), but a feature-complete one is a lot harder. More directly, though, things that can be done by a preprocessor are, by their very nature, less attractive for us to work on. Syntax improvements are nice, and can justify their existence in the core language, but more important to us in the CSSWG is adding functionality that can't be achieved any other way, or not without a lot of painful hacking. I'd rather let a thousand flowers bloom on the syntax side while I spend my limited time adding new features.