My guess would be the vast majority. In addition to being an area that has everyone's interest right now, the hardware is getting more and more specialized so

My guess would be the vast majority. In addition to being an area that has everyone's interest right now, the hardware is getting more and more specialized so it just doesn't benefit general purpose computing. Just as FPU enhancements target a fraction of computing tasks, GPU's target an even smaller fraction, Tensor cores / 16-bit FP etc smaller still.