We successfully updated our computer system and are on Steinberg Cubase 9 now, but continue to work with Protools 10 and Protools HD.
Cubase and ProTools 10 run on both Mac or Win, in Control Room A and B, whichever suits the production better. We reorganized our computer workflow to be able to quickly switch from Studio A to Studio B or external studios. Our beloved analog recording, mixing and mastering tools are of course uncompromised and stay put 😉