Front-end gen ai libs in React for interfaces and interactions

Did anybody see any substantial development of front-end libraries?

I saw two production-grade ones:

AI + UI | AI.JSX - very interesting ideas
Introducing AI SDK 3.0 with Generative UI support – Vercel - one from Vercel

They are both rely on server side rendering to make requests to openai backend

Are there any other libraries, maybe not so heavy and with less server-side rendering?

Looking something to do heavy lifting of building UI with interactivity, advanced rendering, integration with assistant/threads - things like that.

Is anybody pondering why there are so little development in the front-end? Sure, chat form is not a big deal to develop. Everybody got one. A chat form that has interactivity, inserts images, renders code - is probably pretty intensive amount of development.

How’s everybody doing it? Every project from scratch?