I wouldn't say they suck, but they're general-purpose. Anyway, you've gotten into the core of what makes Modular's stack useful. GPUs are great, but it has become obvious that they leave performance on the table, so dedicated AI accelerators get built; however, these don't have software infrastructure and kernels that have been tuned and optimised for years, like CUDA. The bet here is that you can build great hardware, and with a little bit of effort you can unlock all the necessary software for your hardware.