I think RSC is trying to answer the question, “How can we make server rendering and sprinkles of interactivity composable?” What if you want your sprinkles to have server rendered content inside of them, each of which may contain other interactive/dynamic elements?

I posit that any composable version of sprinkles or the “island architecture” will closely resemble RSC.

Only a small fraction of apps will ever use the full power of the RSC architecture. However, the React team doesn’t build apps, they build primitives for building apps. And good primitives are composable.