> But what does bun bring to the table in that scenario?

There's a middle ground between "raw C API" and "full Node-compatible runtime". It sounds like this project is attempting to use that middle ground: the Zig wrapper around JavaScriptCore, rather than the whole abandonware project.

As per another comment here:

> This is not continuing the development on the original Bun (Zig) codebase. It is extracting a subset of that codebase for deployment purposes.