> In my problem space, M:N threading is simply worth it. And if I need anything better performing, I can still switch to C for specific use cases. It maybe sou

> In my problem space, M:N threading is simply worth it. And if I need anything better performing, I can still switch to C for specific use cases. It maybe sounds like you should just use Go, which (as you point out) makes exactly those tradeoffs. I think Rust is aiming for a different market segment, with customers that want to make a different set of tradeoffs. Seems ideal to have both options. In particular, I don't think switching to C will ever be something Rust will want to require of its users.