Using a fun bitcoin mining analogy. A bitcoin mining facility has 10 mining rigs, each running in their own thread. All these mining rigs fail one after the other, but in a last effort before dying, they send their bitcoins to the main process through an mpsc channel.
None of this is real, but this is to test the tracing crate in an asynchronous environment, to check if the context can follow separate threads, which occurs a lot in Sōzu.