If you do server side rendering (SSR) you don't necessarily need to hydrate your entire page if most of your content ist static and only some parts are interactive / dynamic. That is especially true for a newspaper website, which ich what we are working on.
What you want is partial hydration
, sometimes called or related to progressive hydration
or lazy hydration
.
There are a few implementations out there to achive this, for instance second-dehydrator