List:

I'm in the midst of getting my room wired. I've read that "everything
in the studio should be on the same electrical leg."

Welp, if you're a commercial facility, you pay not only for the power
you consume, but ALSO for your power factor and for phase imbalances,
both of which cost the power company extra money.

So do commercial facilities really wire all their audio on one
electrical leg? Do they break it out by rooms to maintain phase
balance? Is this really necessary?

It'd be simple to wire my room "on one leg" but I'm wondering whether or
not it's truly necessary with properly grounded equipment.