> The Hurd is GNU's replacement for Unix, not a research project.
Well, it certainly started out as a intended Unix replacement to complete the GNU ecosystem since a GPLed kernel was the last missing piece. But looking at its history and detours with the attempted replacement of Mach with L4 and Coyotos I think they definitely strayed into the research space. It was probably never intended that way, but things tend to change a bit over 20 years :).
> Research OSs may not go anywhere in most cases, however that does not make OSs that are not going anywhere research OSs.
Yep. I still think it applies to both the current Hurd as well as Minix 3.0 to some extend, but the discussion about what is a research OS and what not is about as decisive as talking about hybrid kernels (see ), i.e. the NT as well as OSX kernels are prime example where nebulous claims just cloud up the whole discussion.