But usable is a perspective...
These images aren't "Great" but they can be said to be usable.
That's Verichrome from 1947 that I just shot and developed a month ago. Very much Nitrate, and very much usable if you can tune in on the proper EI to shoot at.
Mamiya: 7 II, RZ67 Pro II / Canon: 1V, AE-1, 5DmkII / Kodak: No 1 Pocket Autographic, No 1A Pocket Autographic | Sent w/ iPhone using Tapatalk