I pointed out that the directive is for libraries, and stated the framework React is built on reactivity. The vast majority of the ecosystem is built on using state.

Didn't realize I needed to put this together for you, but that means the vast majority of the ecosystem defaults to breaking your build.

_

And frankly, I really have to question your understanding of the topic when you say things like "NextJS is doing any harm by not magically including "use client" on your own files"

Vercel drove RSC home for Next.js. Shopify tried it (because eCommerce) the effort petered out, and then Next.js, needing a bullet in the chamber against Remix and Hydrogen went and dragged a half-baked concept antithetical to the underlying technology over the finish line.

Next.js is still the only actual implementation of RSC: Remix tried it and wrote it off for very obvious reasons... since Vercel/Next.js got to write the framework side and the implementation, there are a massive number of gaps in the standard.