Yeah actually I stead of so much focus on frameworks it's better to focus on better polyfill implementations. It's only a temporary issue in many cases but the larger web does move slowly and then stardards like web components sometimes take a deacde or more to be fully baked. Wasm based polyfill would enable more browser maker innovation and competition without leading to slow and bloared pages for all but one device.
What's the point of polyfilling a nice API when you could just have a nice API to start with which leverages native functions when present? They don't seem to be philosophically different.
Or stated differently, "jQuery is just a JS polyfill for browsers that don't support native jQuery yet."