Vaughan-Nichols, Steven J. "Opinion: The top 10 operating system stinkers" in Computerworld, April 9, 2009: "But after more than 25 years in development, GNU remains incomplete: Its kernel, Hurd, has never really made it out of the starting blocks. ... Almost no one has actually been able to use the OS; it's really more a set of ideas than an operating system."
”Linux and the GNU Project”. Gnu.org. 26 januari 2010. http://www.gnu.org/gnu/linux-and-gnu.html. Läst 14 augusti 2011. ”By the early 90s we had put together the whole system aside from the kernel. /../ Developing this kernel has been a lot harder than we expected; the GNU Hurd started working reliably in 2001”
Hillesley, Richard. "GNU HURD: Altered visions and lost promise", 30 juni 2010. Särskilt sidan 3: "Nearly twenty years later the HURD has still to reach maturity, and has never achieved production quality." ... "Some of us are still wishing and hoping for the real deal, a GNU operating system with a GNU kernel."
