for me, RF's don't really find a home in my studio. Actually, it's very rare that any 35mm finds its way in. I tend to shoot mostly 120 and 4x5 for studio work.
The lack of close focus capability, limited sync speed options, and small format would all be deal breakers.
The only time I break out the rf's in studio is to take fun pics of the hustle and bustle backstage.