Solid-state drives are cheaper than ever, thanks to systematic decline in NAND flash prices owing both to oversupply and increases in densities. NAND flash prices have already declined by 50 percent over 2018, according to a DigiTimes report, and will continue to slide through 2019. ADATA chairman Simon Chen commented that NAND flash makers haven't slowed down capacity expansions, and 2019 could witness an even bigger drop in prices than 2018.

Major NAND flash makers such as IMFlash Technology, SK Hynix, Samsung, Western Digital, Toshiba, have already taped out their 96-layer 3D NAND flash products, which could enter volume production in the first half of 2019. This could impact prices of existing swelling inventories of products based on 64-layer NAND flash. In theory, the 96-layer chips introduce 50 percent increases in densities. Adoption of newer technologies such as QLC (4 bits per cell) will expand densities even further. The same report also projects that DRAM prices could largely remain flat throughout 2019. Most NAND flash makers also happen to make DRAM, and could balance their NAND flash losses with DRAM profits.