I think NAND flash is more flexible in terms of design than DRAM is, for example 3D NAND. NAND flash generally communicate through a separate controller that us

I think NAND flash is more flexible in terms of design than DRAM is, for example 3D NAND. NAND flash generally communicate through a separate controller that uses for example the SATA or USB buses, while the DRAM controller is built into the CPU or chipset.