We have Guix as a system configuration/package manager, the GNU Shepherd as an init, and the GuixSD initrd itself, all of which are written in Guile Scheme.
With the GNU Hurd important parts of the OS could be written in Scheme as well.
The problems start with the desktop, where we don't really have anything that's well-integrated and lispy. Sure, there's StumpWM (Common Lisp), and there's Emacs, but they are separate programmes and there's no link between them.
There is McCLIM[1], a GUI toolkit which looks like a continuation of lisp machine ideas, but as far as I know it does not have an active community (unlike Guix and Guile, whose communities actively work on a Scheme-powered operating system).
With the GNU Hurd important parts of the OS could be written in Scheme as well.
The problems start with the desktop, where we don't really have anything that's well-integrated and lispy. Sure, there's StumpWM (Common Lisp), and there's Emacs, but they are separate programmes and there's no link between them.
There is McCLIM[1], a GUI toolkit which looks like a continuation of lisp machine ideas, but as far as I know it does not have an active community (unlike Guix and Guile, whose communities actively work on a Scheme-powered operating system).
[1]: https://common-lisp.net/project/mcclim/excite.html