I'm not sure I understand the point of this. Why wouldn't I just use the built-in `rpc` module?

What does `backwater` get me that `rpc` doesn't?

Hi, author here;

- It doesn't depend on clustering, which is tricky to manage across very distant geographical regions

- It allows granular control over which modules and functions get exposed

- Clients for it can be implemented based on not much beyond 1) HTTP and 2) external term format support