There is someone on GitHub who's been trying to keep OpenBSD/sgi alive out-of-tree using bits and pieces (e.g: userland binaries) of OpenBSD/octeon, which remains supported.
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.
Sad that it's discontinued, but mostly it's remarkable that so much was done by so few people.