I don't want that. I don't want to care about screen readers (unfortunately I have to). I want a system where I can pick well-defined rules and then css can style it, screen readers will understand it, automations can parse it, keyboard navigation is free.

Obviously thats not what we got, but I feel like the set of established UI patterns is manageable enough that it could be built.

A great example is the new <select> styling that developers styled in all kinds of creative ways. Now give me that for comboboxes, trees, data-grids etc...