Raspberry Pi 4 V3DV graphics driver achieves Vulkan 1.0 conformance
Dumb question - if I want to do simple image processing on a pi4 (2d ffts, small kernels, summing 2d arrays in one dimension, finding Maxima), and I care about performance, is this a reasonable stack to use,with decent prospects or is it faster/safer to stick on the Arm, despite the GPU. 1k x1k monochrome images,  at 3-10 fps ( or more)? 
Jetson nano seems to be the obvious commodity but pricier alternative with GPU access, but smaller ecosystem.