> Is this a uniquely USB3.0 problem?
https://usb.org/sites/default/files/327216.pdf
Paper by Intel about USB 3.0 interfering with 2.4 GHz WiFi. The fact that the USB-IF hosts this paper on their own site seems to be a strong endorsement of their conclusions too.
It is worth noting that the RF noise generated by USB 3.0 covers a fairly wide spectrum from basically zero up to the mid-4 GHz range, but it gets discussed mostly in the context of interference with 2.4 GHz because most USB 3.0 capable devices don't have any other radios in that range to interfere with.