How are PCIe Expansion cards not way more popular

How are PCIe Expansion cards not way more popular pcie m2 slot DESIRE PCIE SSD · HIGH SPEED PCIE INTERFACE · BETTER QUALITY AND STABILITY · HIGHER CAPACITY LOWER COST Download Appearance pcie 30 in 40 slot Understand default PCIe slot behaviour with Dual NVMe PCIe adapter Another idea was to use the slot for Wifi for something else

pcie 30 in 40 slot The NVMe PCIe card allows you add PCI-e NVME SSD to your motherboard without slot, perfect solution for PC upgraded 【APPLICABLE

pcie 50 slot slots on motherboards and other devices do not support all SSD sizes 2 PCIe base SSD to PCIe ×4 Adapter HW Tools 14 February 2014 2 SSDs use the PCIe interface, which allows for much faster data transfer rates than SATA SSDs, which are limited by the SATA interface SSDs can achieve