Not that I maintain any hugely popular deep learning code, but my own "hobby"/dev hesitance at adding multiple devices is that I don't own them to test them. I

Not that I maintain any hugely popular deep learning code, but my own "hobby"/dev hesitance at adding multiple devices is that I don't own them to test them. If I have an NVIDIA GPU, the only PyTorch backend I can promise even "somewhat works on my machine" is CUDA.