OS level threads are absolutely not objectively terrible and what eridius described was the rationale. This is the post that killed off green threads: https://

OS level threads are absolutely not objectively terrible and what eridius described was the rationale. This is the post that killed off green threads: https://mail.mozilla.org/pipermail/rust-dev/2013-November/006550.html https://mail.mozilla.org/pipermail/rust-dev/2013-November/00... I find it hard to believe you can read that and believe that Rust made this decision for anything but sound technical reasons.