Incremental rehydration techniques make this much much less of an issue (React 18 supports this now, IIRC, for instance). The tl;dr is that if you employ SSG or SSR you won't endup up with immediate re-hydrating once the client loads up, but only when something triggers the need for re-hydration, like a button click.

That to me seems like the sweet spot for highly interactive applications that are very stateful, however like I said previously, your mileage may vary.