@mos_8502 Yes, most distros don‘t need to exist as „operating systems“. They just could be Debian packages, because basically they do some GUI polishing or exchange a small part of default Debian.
Be sure to know Nextspace and https://airyx.org though.
@lazarus Basically, what I want is an OS that puts GNUStep up front and centre, and anything that's baked into the base system is there to support that or it got cut right out. That means paring it down to the bare minimum of "first-party" packages, and trimming the complexity of the underlying OS as much as possible without compromising in the slightest the ability to compile and run any GNUStep based application.
So for example, it would have the simplest init system, a very spartan command line environment, etc, and the actual distribution would be supporting *only* the included software; the rest would be pulled in through something like Homebrew, or by installing .app bundles to /Applications or ~/Applications, etc.
It would not be concerned with POSIX compliance, nor of being like every other system, it would be concerned with providing the best out-of-the-box GNUStep experience possible. Beyond that, if the user wants to install something custom, they are welcome to it.