This might be handy for some folks: http://feedback.wildfiregames.com/report/opengl/
Based on reports gathered from players of 0AD, a free RTS, and covering quite a broad spectrum of graphics hardware under both Windows and Linux, which I believe makes it a viable source of relevant info for Quake ports.
One thing that jumped out at me is the stats for GL_MAX_TEXTURE_UNITS: nobody has less than 2, aside from people who are running with Microsoft software OpenGL. http://feedback.wildfiregames.com/repor ... TURE_UNITS
Makes it seem more and more like a waste of your own time to support single TMU rendering in an engine these days...
OpenGL Capabilities Database
OpenGL Capabilities Database
We had the power, we had the space, we had a sense of time and place
We knew the words, we knew the score, we knew what we were fighting for
We knew the words, we knew the score, we knew what we were fighting for