[uryga]

> Why did they not include other companies

AFAIK: the initial stages of the project involved Vercel and Shopify [edit: and Gatsby]. these companies maintain frameworks and hosting solutions for them, which makes them good partners to work on full-stack features like this. notably, the convention ("use client") came about based on early feedback from Shopify.

the reason to work with framework authors first is that RSC requires a high degree of coordination/wiring across client code, server code, and the bundler. React itself only implements a couple of low-level primitives that need to be wired together by something like a framework to actually do anything useful

> expecting all third-party packages, React-related or not, to buy into the "use client" directive

AFAIK: non-react code has no reason to care about this directive. and on the react side, couldn't you make the same complaint about most breaking changes?