Why didn SGI simply apply the GLX license it already uses?
SGI is on a mission to keep its open-source licenses to a minimum (as well as to make them leaner and cleaner). The very name of the GLX license ties it to the GLX source code. If SGI continued in that fashion, there’d be a separate open source license for each and every product or collection of code SGI open-sourced. SGI’s plan moving forward is to establish better and more sensible ways in which to deliver and apply our software licenses – all of our software licenses, whether for regular SGI software or open-sourced software. So, while the text of a given license may remain the same, the format for delivery and application may change – but only for the better, for everyone.