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."
Hillesley, Richard. "GNU HURD: Altered visions and lost promise", June 30, 2010. See especially page 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."
