I read several times that DSLR cameras were great for documentaries and I never really agreed with that (cf.EX1and 5Dmark II).
Yes you can shoot gorgeous footage with a DSLR but they are so many technical limitations (audio, 10min clips, …) which can be very challenging on a documentary shoot.
Don’t get me wrong I absolutely love shooting with a DSLR but I share Vincent Laforet’s point on view in this interview:
I specially like what Vincent is saying about movement and story. It’s great to have access to great tool and high end technology but at the end of the day, am I a technician or a story teller ? Why am I shooting film in the first place ? 😉