Why would that be relevant if the thin wrapper is fully compliant with the POSIX/GNU standards? Busybox with it's single binary, depend-on-arg[0]-hack implanta

Why would that be relevant if the thin wrapper is fully compliant with the POSIX/GNU standards? Busybox with it's single binary, depend-on-arg[0]-hack implantation was at one point an "untested strategy", yet look at it now. Rust's Coreutils need to offer a real uvp if they want to see real adoption. Providing coreutil as a library and not forking processes would certainly qualify as that.