As I understand, original Thunderbolt was mostly Intel's work, and Apple figured out how to have it with the mini-DP connector. Later Thunderbolt is Intel doin

As I understand, original Thunderbolt was mostly Intel's work, and Apple figured out how to have it with the mini-DP connector. Later Thunderbolt is Intel doing the right thing: they took many of the features that USB-C lists as optional, and made them required for Thunderbolt specification. That's why the first M1 Macbook was Thunderbolt-capable/enabled, not fully Thunderbolt certified