If you are referring to how SSR pages need to download the serialised page "props" and not just the html+js then good news! Solid 2.0 is about to solve this.

If you are referring to having to download react itself then you have to download the WebComponents code too.

Actually with smart use of forms and links you could make a js free react page (using forms to submit state changes) more easily than for WebComponents

> web components are browser native

I would say very few people are using bare web component. They'll be using a library like Lit at the very least, so your argument is moot.

> full download

Like 50kb. Roughly the same size as Amazon website's icon sheet.