Indeed, a GPU is effectively a massive grid of RISC cores (and accessing global memory is a major bottleneck). I do think that "a GPU but RISCV" is an interest

Indeed, a GPU is effectively a massive grid of RISC cores (and accessing global memory is a major bottleneck). I do think that "a GPU but RISCV" is an interesting proposal, but I doubt the major players would be willing to abandon their existing instruction sets