35mm is pretty rare for fashion. Not unheard of, but most of it is 645 or more likely 6x7. If it's film, that is, most of it is digital. When 35mm film is employed in editorial fashion, it's often b/c that's all the $300 a day budget allows for w/o the photographer going broke.
I don't know anyone who shoot e-6 fashion anymore. Just digital or neg.
But these are just my observations, and they're limited.