Nexus 5X won't ship with a USB-C cable that plugs into older USB ports
 

Google appears to be going all in for the USB Type C future with the Nexus 5X. The LG-made phone ships with a USB-C to USB-C cable, but it won't include a USB-C cable that plugs into most computers and chargers today (which use USB Type A). You'll...

http://www.engadget.com/2015/10/02/nexus-5x-usb-c/