CUDA isn't really used for new code. Its used for legacy codebases.
In the LLM world, you really only see CUDA being used with Triton and/or PyTorch consumers that haven't moved onto better pastures (mainly because they only know Python and aren't actually programmers).
That said, AMD can run most CUDA code through ROCm, and AMD officially supports Triton and PyTorch, so even the academics have a way out of Nvidia hell.
In the LLM world, you really only see CUDA being used with Triton and/or PyTorch consumers that haven't moved onto better pastures (mainly because they only know Python and aren't actually programmers).
That said, AMD can run most CUDA code through ROCm, and AMD officially supports Triton and PyTorch, so even the academics have a way out of Nvidia hell.