What has never worked is 'stacking' converters.
That first Belkin cable picture shown by pavitchat is of a cable sold as a USB 3.1 cable (the green dot at the top) which features USB-C connectors as an attribute. Some displays may be able to interface with either or both of those, but in general ThunderBolt-3 is only good for genuine ThunderBolt devices, and a Charging cable often does nothing more. The ports on the most recent MacBooks are capable of many different protocols, including ThunderBolt-3, USB 3.1, and charging at multiple Voltages. It has USB-C on each end, but is only capable of Charging and USB-2. The best worst counter-example is the MacBook Charge cable. It does NOT adequately describe its function. USB-type-C should be thought of as an Attribute of a cable that specifies its cable-ends.
