Thunderbolt is for permanently attached expansion (10gb Ethernet, eGPUs, multi drive enclosures, port expansion/docking etc) and USB is for quick connections (USB keys, SD cards, etc).
I seriously doubt anyone will ever use these ports for Thunderbolt devices, because there are very few thunderbolt devices that people use regularly, and if they know what Thunderbolt even is they know to look.
Thunderbolt is for permanently attached expansion (10gb Ethernet, eGPUs, multi drive enclosures, port expansion/docking etc) and USB is for quick connections (USB keys, SD cards, etc).
I seriously doubt anyone will ever use these ports for Thunderbolt devices, because there are very few thunderbolt devices that people use regularly, and if they know what Thunderbolt even is they know to look.