I think at this point we really don't need more of these CSS supersets but more comprehensive CSS frameworks like Compass and web framework integration with these CSS frameworks, i.e middlewares and asset management tools. I for once would love to see Compass ported to Less.
Well, yes, that's my point. We don't need more CSS supersets, we need fewer; one standard one, that is called "CSS" (or "CSS4" or whatever). That, then, can be the target for frameworks like Compass, instead of them targeting CSS 2.1/3 or targeting only a single CSS superset like Less, Sass, or now Closure.
