How are PCIe Expansion cards not way more popular

SATA SSD Vs PCIe SSD:What Are the Differences? pcie m2 slot 2 SSD slot, and support for a PCIe NVMe slot is listed as an optional feature for AMD's B650 chipset motherboards Most B650E, X670 and pcie slot function NVME Designed for tech enthusiasts, hardcore gamers, and professionals who need unrivaled performance NVMe PCIe interface marks the next step in storage

pcie slot for gpu Transcend's PCIe SSD- MTE220S features 3D NAND flash and a DRAM cache It utilizes the PCIe Gen3 x4 interface and an 8-channel controller for ultra-high