Cascade layers

[geoffrey-eisenbarth]

Evaluate the @layer rule for adoption. - Missing Roadmap

[geoffrey-eisenbarth]

Maybe another day, but probably not for 2.0.

[geoffrey-eisenbarth]

I think I misunderstood the context when we were discussing closing "consider..." issues. @layer is in our target browserlist and would eliminate all the specificity hacks.