In the show, I mention that leaving Mark Williams Company was "a story for another time", but the short answer is that Linux crushed them. Coherent Unix had to make a choice to compete with either Windows, SCO Unix, or Linux, and had enough budget to add either X Windows or TCP/IP networking. They chose X11, and IMO that killed any chance of Coherent Unix being useful in a world of Linux and FreeBSD.
In the show, I mention that leaving Mark Williams Company was "a story for another time", but the short answer is that Linux crushed them. Coherent Unix had to make a choice to compete with either Windows, SCO Unix, or Linux, and had enough budget to add either X Windows or TCP/IP networking. They chose X11, and IMO that killed any chance of Coherent Unix being useful in a world of Linux and FreeBSD.