>Nvidia can make things arbitrarily difficult both technically and legally. I disagree. AMD can simply not implement those APIs, similar to how game emulators

>Nvidia can make things arbitrarily difficult both technically and legally. I disagree. AMD can simply not implement those APIs, similar to how game emulators implement the most used APIs first and sometimes never bother implementing obscure ones. It would only matter that NVIDIA added eg. patented APIs to CUDA if those APIs were useful. In which case AMD should have a way to do them anyway. Unless NVIDIA comes up with a new patented API which is both useful and impossible to implement in any other way, which would be bad for AMD in any event. On the other hand, if AMD start supporting CUDA and people start using AMD cards, then developers will be hesitant to use APIs that only work on NVIDIA cards. Right now they are losing billions of dollars on this. Then again they barely seem capable of supporting RocM on their cards, much less CUDA. You have a fair point in terms of cuDNN and cuBLAS but I don't know that that kind of ToS is actually binding.