With the bandwidth you do get more flexibility though, and with pci express bifurcation you can get the bandwidth equivalent of 4 pcie4 16x from a single pcie6

With the bandwidth you do get more flexibility though, and with pci express bifurcation you can get the bandwidth equivalent of 4 pcie4 16x from a single pcie6 16x. And that's great since the vast majority don't need that much bandwidth anyway. Today you typically have a whole slew of devices sharing 4x to the cpu. More bandwidth would open up for more usb and perhaps cheaper onboard 10gig Ethernet etc.