I suspect it's the vulnerability of the interface to DMA and Option ROM attacks.
Apparently it leaves the attached system wide open to low level attacks.
Read the Wikipedia article on Thunderbolt.
https://en.wikipedia.org/wiki/Thunderbolt_(interface)
Maybe they haven't solved that issue yet?

Last edited by JohnG11; 10/05/19 11:15 AM.

Akai EWI 4000, VL70m, AN1x, PX560.