I'd take "usable." If AMD was half the performance of NVidia, but open, stable, compatible, and robust, that would reach that bar for me, and I think for a lot

I'd take "usable." If AMD was half the performance of NVidia, but open, stable, compatible, and robust, that would reach that bar for me, and I think for a lot of people. I think that will be an increasingly hard bar to clear, as software becomes coupled to CUDA, though. AMD will be chasing a losing race. They won once with Intel, but this one feels harder....