Audience asked what original business needs pushed Sharon to build UringMachine and what example would tell someone they should optimize that part of their application. Sharon said he has worked with fibers and io_uring for years and already shipped Polyphony (very high-level) and a much lower-level gem; UringMachine was about finding the right abstraction level. Concrete driver: he maintains industrial process-control applications built on EventMachine, which has been unmaintained for years and is a risk for apps that have been running for many years and must scale — UringMachine's name itself comes from wanting a replacement for EventMachine.