As a foot note to his latest blog post, Rich Geldreich says he is no longer working at Valve nor is he contributing anymore to the Valve VOGL OpenGL debugger targeting game developers. He didn't shed anymore light on his departure and offhand I am not aware of what company (if any) he's ended up at for now, but will try to find out that information shortly.
However, in his latest blog post he's pointed out to more articles about the troubles with OpenGL, after a long string of other recent articles about how OpenGL is broken, the problems with OpenGL, etc.
Rich Geldreich points to an article by Alex St. John in about OpenGL vs. Apple's Metal API. Alex St. John is responsible for Microsoft's DirectX in its early days and went on to found the WildTangent game publishing company. There's also a link to a TIME.com article pointing to Alex St. John's blog post about the belief that Apple's Metal API is such a blow to OpenGL.
Given all the recent GL attention, it will be interesting to see what OpenGL 5.0 looks like... Share your thoughts within our forums.