Linux also had USB 3 draft support before there were even any consumer products on the market. Intel engineers wrote the XHCI driver for Linux, well before deve

Linux also had USB 3 draft support before there were even any consumer products on the market. Intel engineers wrote the XHCI driver for Linux, well before developer documentation was available publicly. It was added to other operating systems as the hardware became more readily available, understandably it took some time. USB 3.0 is not simple to implement.