How do you propose we get to such a language that is more than a superset of the status quo if CSS, the compilation target itself, is severely limited?
I'm guessing you aren't writing binary in your day to day work, are you? I'm fairly certain whichever language you're working with is more featureful and ergonomic than working directly in binary.
Similarly, Elm has a different surface area from JavaScript, and yet JavaScript is the compilation target.
CSS doesn't need to be featureful to be a compilation target.
