Ever since people figured out that the Raspberry Pi 4 has a PCIe bus, the race was on to be the first to connect a regular PCIe expansion card to a Raspberry ... have both PCIe x1 and USB on ...
PCI Express (PCIe) has been around since 2003, and in that time it has managed to become the primary data interconnect for not only expansion ... any card of any configuration (x1, x4, x8 or ...