Opening the standard… compromise the product massively
Citation needed.
All NVIDIA needs to do is:
release the spec with a license AMD and Intel can use
form a standards group, or submit it to an existing one
ensure any changes to the spec go through the standards group; they can be first to market, provided they agree on the spec change
That’s it. They don’t need to make changes to suit AMD and Intel’s hardware, that’s on those individual companies to make work correctly.
This works really well in many other areas of computing, such as compression algorithms, web standards, USB specs, etc. Once you have a standard, other products can target it and the consumer has a richer selection of compatible products.
Right now, if you want GPGPU, you need to choose between OpenCL and CUDA, and each choice will essentially lock you out of certain product categories. Just a few years ago, the same as true for FreeSync, though FreeSync seems to have won.
But NVIDIA seems to be allergic to open standards, even going so far as to make their own power cable when they could have worked with the existing relevant standards bodies.