steveklabnik was not saying that it costs Rust to avoid libc, he was saying that "calling C has high overhead" (i.e. the main underlying reason for avoiding lib

steveklabnik was not saying that it costs Rust to avoid libc, he was saying that "calling C has high overhead" (i.e. the main underlying reason for avoiding libc) is not something Rust can do, given its goals. This also means there's not nearly as much reason to put the effort into reimplementing the libc abstractions on every platform.