1. They have no say in the API so NV would just steer the API in ways to make sure it would be suboptimal on AMD hardware. 2. It's not just the API. It's the e

1. They have no say in the API so NV would just steer the API in ways to make sure it would be suboptimal on AMD hardware. 2. It's not just the API. It's the entire SDK that has NV specific hooks that AMD can't tap into