When did slots become commonplace? And NVME slots?

Expansion Slot #nvme #desktop #motherboard m 2 nvme slot on motherboard 2 standard contains variants with up to four PCIe lanes, one SATA 6 Gbs and or one USB port So it is possible to connect PCIe as well as SATA SSDs m2 pcie slot Special features of SSDs: The slot is not only reserved for SSDs with a PCIe controller There are also combination slots that can

m2 sata slot ; Motherboard via one of: PCIe ×4; PCIe ×4; PCIe ×4; Serial ATA · USB · Intel · Phison · Realtek · Samsung · Silicon Motion · SK Hynix