@sun systemd is not something that is developed "in Linux" (Linux developers have rejected patches that do things like add dbus to Linux for example) - systemd is developed on GNU, although it uses certain Linux-only features like cgroups, meaning it only runs on GNU/Linux.
@sun Linux is only a kernel, so why would you repeat yourself by writing; kernel kernel and imply that Linux is more than a kernel?
systemd doesn't need just Linux to work - it needs GNU gettext, GNU coreutils and GNU readline, GNUperf and much more GNU (some GNU is optional, like libgcrypt and libidn2 but you lose functionality without it).
@goo@sun BusyBox is an inferior clone of GNU under a GNU license that cannot be compiled without GNU software.
systemd has harddeps on gettext, coreutils and gperf and more, thus you have installed GNU without realizing it to make GNU/BusyBox/systemd/Linux or systemd/Linux.
@sun@goo GNU has multiple kernels and multiple OS's.
Hurd is not an infant, although more features would be convenient.
There's the church of Emacs OS, the GNU GRUB OS, GNU Hurd, GNU Linux-libre and a number of other kernels that I don't remember the GNU package name of at the moment.
An operating system is a system of software that allows you to operate a computer and GNU indeed provides that; https://www.gnu.org/software/
@adiz@goo@sun How is it wild? The only people developing it are a handful of people hacking on it for fun, as GNU Linux-libre does work despite its limitations, meaning GNU developers work on other GNU packages; https://www.gnu.org/software/