I really wish they would start with "this is for next.js/react".
I had to dig through the docs and get to the installation instructions just to find out that it's React only.
It looks great, but I'm always confused why design system folks wouldn't base everything off web components, which work with almost any framework.
I didn't know what web components were until after I'd released it for React. I was working in a complete vacuum until I put this out there, and then I started to get involved with the community. Before that I was pretty much the only designer/techie I knew. I'm not a professional developer. I'm just a designer who knows enough TS to piece things together.
So having it for React/NextJS isn't an affirmative decision. It's just the only thing I knew how to do at the time. After the first launch last summer I had a couple folks reach out to help port to SvelteKit and Vue, but you know how it is. People get busy.