Can it be used without React? Why make it React-dependent/focused? How's it better than going with synch engines, like eg. Zero? Didn't look at code, sorry, on the go now.
Yes it can, a lot of people just choose a React fullstack framework, and it integrates specifically well inside those – so it's just a focus. But it can also be deployed using Docker, Bun, Node or Cloudflare Workers. There's an integrated SDK for TypeScript, but since it's all just REST APIs, it'll work with any stack.
Not familiar with Zero, but it looks interesting, will check it out.