Not technically RAM, but used similarly: there are workstation GPUs now that have what is essentially a 2 terabyte SSD bolted to the side and hardwired to it for use as swap space without having to take the time to go through the motherboard and CPU, in addition to 16 gb of actual RAM.

I want one. It costs as much as the rest of my computer combined (including peripherals and the table) and I doubt Blender supports it, but fuck it, I want one