“Making science accessible to everyone is important to us. That's one of the reasons why GeForce cards can run CUDA.” — Bryce Lelbach at Nvidia

AMD meanwhile considers GPU compute as a premium feature... which is a different approach.

Not having a shippable IR like PTX but explicitly targeting a given GPU ISA, making this unshippable outside of HPC and supporting Linux only also points in that direction.

Intel will end up being a much better option than AMD for GPU compute once they ship dGPUs... in their first gen.