I have already proposed something. Compare performance in Final Cut Pro X between AMD and Nvidia Maxwell GPUs. You will see why Apple went with AMD GPUs as go-to solution.
People don't understand that one of the reasons why Apple ditched Nvidia was the fact that Apple does not want optimization of performance in application through drivers.
Actually, that is quite perceptive. In many ways it makes sense. Apple does something similar with metal to allow the application direct access to the GPU.