One thing I appreciate about Rust's stdlib is that it exposes enough platform details to allow writing the missing knobs without reimplementing the entire wrapp

One thing I appreciate about Rust's stdlib is that it exposes enough platform details to allow writing the missing knobs without reimplementing the entire wrapper (e.g. File, TcpStream, etc. allows access to raw file descriptors, OpenOptionsExt allows me to use FILE_FLAG_DELETE_ON_CLOSE on windows, etc.)