No, stackful coroutines requires a runtime. Not going to work on embedded, which is where async rust shines the strongest.

If you don't care about embedded that is fine. But almost all systems in the world are embedded. "Normal" computers are the odd ones out. Every "normal" computer has several embedded systems in it (one or more of SSD controller, NIC, WiFi controller, celular modem, embedded controller, etc). And then cars, appliances, cameras, routers, toys, etc have many more.

It is a use case that matters. To have secure and reliable embedded systems is important to humanity's future. We need to turn the trend of major security vulnerabilities and buggy software in general around. Rust is part of that story.