Why do you think they are so poorly supported? I know relatively few users have multi-GPU systems...it may be as simple as that, but I would have expected DX, O

Why do you think they are so poorly supported? I know relatively few users have multi-GPU systems...it may be as simple as that, but I would have expected DX, OpenGL, and the new one from Valve (blanking right now, Vulcan?) would have improved usage and stability with minimal per-game development.