Thunderbolt is not even part of the base spec, it just piggy backs on the generic alternate mode that can just as well carry Displayport vidoe (or anything, rea

Thunderbolt is not even part of the base spec, it just piggy backs on the generic alternate mode that can just as well carry Displayport vidoe (or anything, really). Most of it is not even with the cables, but the chips and software at either end.