I would be very interested in this too, if the idea was merely to accelerate rendering via CUDA but making use of system memory. If textures and geometry were expected to fit into VRAM I think you’d quickly lose people. Too many (generally useless) GPU-only renderers out there these days. I haven’t heard of many short films being rendered with Octane, for instance. My $0.02.
Ive been exploring Gaffer, and itd be neat to be able to render an animation with appleseed using just a couple of consumer grade GPUs.