[toothcomb]

But sadly you have to consider the browser's implementation. Or are you referring to the little macros's or mixins or whatever they are called?

[nex3]

I believe jlong is referring to the functionality added by an abstraction layer. Sass allows people to experiment with additions to CSS, and it gives the CSS designers good insight into what people would find most useful.

[toothcomb]

Css has been thwarted by poor implementation that has led to confusion, and elitism. With regards to abstraction I don't see why there aren't any excellent WYSIWYG editors.

[nimbupani]

There is, it is called WidgEditor http://www.themaninblue.com/experiment/widgEditor/