The strategies being employed here look similar to those of xi (CRDTs for multithreaded buffer representation) and neovim (separable backend and frontend). This is definitely a project I'll be keeping my eye on.
Another thing that's interesting is that if they're targeting a web-embedded editor (mentioned as a goal), they could possibly reduce the need for a full Electron install, possibly using the Rust web-view bindings[1] to link with the system web engine.