For those with "Cheesegrater" macs there is now a workaround to use Thunderbolt.

 

And 'the goodies'; how to do it...
https://www.pro-tools-expert.com/pr...th-thunderbolt-the-impossible-is-now-possible

 

Actually, that idea came from the people at eGPU.io back in September of last year.https://forums.macrumors.com/threads/testing-tb3-aic-with-mp-5-1.2143042/

 

So did you just look that up just now...or with held that knowledge since last September?

Yup a few people had "ideas" but none gave the final solutions and how to do it with thunderbolt and Interfaces and exactly what you needed and had to been done.

An idea is just a whiff of air until it becomes something.

 

Thanks @The Pirat for the complementary information.