[Etheryte]

While this is an interesting thought experiment, and the outlined problem is a real issue, I don't think the outlined solution is a good way to resolve it. The main problem here is predictability: maybe it's simply that I'm not used to thinking about CSS this way, but the proposed CSS rewriting parser means it's not immediately obvious how what I write maps to the end result.

It's entirely possible that I'm missing some of the benefit here, but it seems to me that scoped styles etc largely already solve this problem.