I wish it was still supported, but I'm sure I was one of very few that was actually using it! Even then it was just for fun.
Very interesting story.
I used to regularly visit SGI documentation due to OpenGL/IrisGL, Inventor, and the original HP STL C++ documentation that SGI hosted, and naturally dive into Irix documentation in boring days.
That was a pretty epic story. I'll admit that I skimmed a few parts. :)
Sad that it's discontinued, but mostly it's remarkable that so much was done by so few people.