Bandwidth-wise, it's fun when you have a storage array instead of just 1 nvme. Then you can saturate the pcies, and go beyond what's cost effective on ram. Interesting to think of this as opening the door to 10-100T MoEs..
Wasn't there a storage device some
Years ago (decade plus) that was RAM strapped to a PCI-E card with the electronics to present the RAM as a storage device?