Why should Nvidia devote resources, potentially a significant amount, to make Optimus work on Linux? I do not buy the argument that they should do so out of gratefulness that the Linux based Android OS let's them sell a large number of unrelated chips.
I'm open to being convinced otherwise, but citing a lack of "gratefulness" is not compelling.
That may be true for specific features like Optimus--I can't say. But if you're talking about writing a full 3D driver stack for a modern GPU, you're almost certainly underestimating the effort involved by several orders of magnitude. NVIDIA has hundreds of full-time software engineers working on the various parts of the GPU driver stack. Now imagine doing it without the immense institutional knowledge.
Now try to find a laptop with a discrete Nvidia GPU that doesn't have this Optimus junk and you'll see the problem.
