But then, why not have this be defined by the client? I think I would like to see more websites entirely devoid of css, together with an evolving ecosystem of

But then, why not have this be defined by the client? I think I would like to see more websites entirely devoid of css, together with an evolving ecosystem of browser-side theme-like css rulesets to style and layout sites based on the page's semantics and everyone's unique preferences, like we style our desktops and terminals. But that's just my cloud cuckoo land, right?