PinePower's cables seem good enough for everything except probably the high-res display / PCIE cases
https://pine64.com/product/usb-type-c-to-usb-type-c-silicone... https://pine64.com/product/usb-type-c-to-usb-type-c-silicone...
https://pine64.com/product/usb-type-c-to-usb-type-c-silicone... https://pine64.com/product/usb-type-c-to-usb-type-c-silicone...
USB 2, 3 (or at least the speeds introduced with 3), and 4 are all valid choices for cables.
That's the problem with USB cables. They all seem to work when you don't look too closely.