I'd rather have a language that directly targets the GPU. In fact, I started using WebGPU wgsl and compute shaders for prototyping and it suits me extremely well.
Julia does have really nice GPU support, being able to directly compile julia code into CUDA, ROCm, Metal or other accelerators. (Being GPU code it's limited to a subset of the main language)
Sorry, do you have an example of using wgsl for prototyping? I'm having trouble imagining something like that, since WebGPU is not exactly terse.