I like eikenberry&#x27;s explanation of why in the sense of &quot;what was the logic&quot;; I speculated some on practical tradeoffs over on lobste.rs:<p><a href="https:&#x2F;&#x2F;lobste.rs&#x2F;s&#x2F;c8pxgu&#x2F;performance_green_threads_why_it_matters&#x2F;comments&#x2F;fdus6y#c_fdus6y" rel="nofollow">https:&#x2F;&#x2F;lobste.rs&#x2F;s&#x2F;c8pxgu&#x2F;performance_green_threads_why_it_...</a>