I’ve never designed an electrical distribution system for a pro studio. My experience lies primarily in completely rewiring two houses that I owned in the past, along with a 6 month period where I wired 3-phase motor control boxes for.industrial oil burners.
So, I had not encountered the twisted pair power leads in place of romex. And I had not considered the possible benefit of a local breaker panel. I also, as a home studio guy, found it hard to imagine the need for 60 amp service. So, apparently, I was out of my element here. Feel free to disregard my comments as needed…