Indeed if you leave out the 2 SBU wires, you get a cable that works for USB 3.x and TB, but not DP or HDMI. Such a cable isn't compliant to the Type-C spec, bu

Indeed if you leave out the 2 SBU wires, you get a cable that works for USB 3.x and TB, but not DP or HDMI. Such a cable isn't compliant to the Type-C spec, but that won't stop cheap vendors from saving a few grams of copper.