There might be an audience for disillusioned rust people who get bored with fighting the borrow checker etc, but true rust developers, like c++ devs want control and won't want to hand that to go's runtime.

My guess from the readme is that the author loves some of the rust features and syntax but the simplicity of having the go language and runtime take care of making it work is just too compelling. As far as the language itself, there's nothing here that you couldn't build with go and it would likely be more productive.