> But this is 100% a python-for-CUDA-C replacement on the GPU

Ish. It's a Python maths library made by Nvidia, an eDSL and a collection of curated libraries. It's not significantly different than stuff like Numpy, Triton, etc..., apart from being made by Nvidia and bundled with their tools.

I’m mainly interested in the performance implications. The less shit between me and the hardware, theoretically the better the performance. In a world where these companies want to build nuclear power plants just to power NVIDIA GPU data centers, I feel like we need to be optimizing the code where possible.