Comment by bigyabai

> I don't understand why AMD can't offer a drop-in replacement for cuda which implements an identical API.

AMD, Apple and Intel all sell raster GPUs. Their GPU architecture is not optimized for general-purpose compute, and reorienting around that goal would create a "Fifteen Competing Standards" scenario pretty quickly. It's as much of a hardware issue as it is a software one, and none of these businesses like to cooperate (see: the last 15 years of Khronos drama).

In AMD's case, they don't see a need to sell consumer GPUs with a true CUDA analog since their datacenter product is architecturally distinct from their GPUs. Consumers come to AMD for cheap graphics performance, and adding additional hardware on top of the SMs would be a waste of money for many (or most) customers. This is why you see such a rift between CDNA and RDNA chips on compute workloads, and why it's unlikely that we'll see a CUDA-equivalent product out of AMD any time soon.