The trouble is that the RAM chip on the Pi is a high density module that's going to have come under pressure from the datacenter buildouts.

An 8 GiB DIMM for a desktop or server is using 8x 1 GiB chips or 16x 512 MiB chips (9/18 for ECC). An 8 GiB Pi uses a single 8 GiB chip. That's the same density as you would use for 128 GiB or larger sticks.