Has there been any thought/exploration in non-nvidia platforms? ROCm, vulkan, metal, npus, opencl, etc?

cuTile Rust lowers through CUDA Tile IR, which is NVIDIA-specific, so any of those targets (ROCm, Vulkan, Metal, NPUs, OpenCL) would be a new compiler backend. The programming model itself isn't NVIDIA-bound, but the lowering is.