At least part of the DRAM issue is related to Intel's CPU supply issues being a drag on new PC sales.[1] But overall for DRAM and NAND, it's probably a case of

At least part of the DRAM issue is related to Intel's CPU supply issues being a drag on new PC sales.[1] But overall for DRAM and NAND, it's probably a case of market saturation in many sectors. [1] As well as AMD has been doing with Ryzen, most large computer purchasers are still Intel buyers and are slow to change.