Seems much more complicated than even the current setup where browser either do not implement all features or implement them inconsistently. Browser-building c

Seems much more complicated than even the current setup where browser either do not implement all features or implement them inconsistently. Browser-building companies interact with the standards a bit differently than the rest of us (I am assuming you do not work on IE, Firefox, Opera, Safari, Chrome etc.) Separating features into separate documents likely does not affect their process much.