More than four million developers work within Nvidia's CUDA toolchain, and approximately 85% of AI applications are built on PyTorch.

From the articleGoogle brings open-source TorchTPU to challenge Nvidia’s AI hardware dominance | МежаAlso in Switch Your PyTorch Model From Nvidia to Google TPUs With One Line: TorchTPU Is Now Open Source, Google has joined Amazon in attacking Nvidia’s stronghold with AI app developers, Switch Your PyTorch Model From Nvidia to Google TPUs With One Line: TorchTPU Is Now Open Source, Google unveils TorchTPU in a push to break Nvidia's stranglehold on AI compute - SiliconANGLE