As far as I am concerned, I consider SD cards the equivalent of a floppy disk. The equivalent of a hard drive would then be a CF card (unfortunately much less common than SD cards these days). Or of course any USB drive if we give up on the card format/connection style.
Yeah but RPi SoC is apparently lacking in PCIe lanes. I think they need a different SoC so they can finally have ethernet/storage/usb controller on the PCIe bus.
