It's turtles all the way down, and I think this is needlessly splitting hairs.
L1->L2->L3->(L4->)DRAM->Storage
3D XPoint is being considered as the DIMM-module, byte-addressed "memory" before storage. Saying that it "augments" DRAM is almost meaningless because we already have multiple levels of DRAM.
L1->L2->L3->(L4->)DRAM->Storage
3D XPoint is being considered as the DIMM-module, byte-addressed "memory" before storage. Saying that it "augments" DRAM is almost meaningless because we already have multiple levels of DRAM.