I would note the number of uncompressed effects shots [face replacements, sky replacements, etcetera] that certainly came into the "rolling post house" at stages before, during and after the DI. Michael will correct me if I'm wrong, but an uncompressed conform would've been possible on the same hardware with the same mindset.
There's a very big difference between supplying transcoded plates for the limited number of frames required for VFX, and storing and recovering all of the footage shot for a production in uncompressed form, especially with a director who has been known to have shooting ratios of 150:1 or more. When all of that footage is uncompressed, it's got to be stored and recovered somewhere, even when it's all stored on LTO carts. As for the material that went to the DI, my understanding (and I think I'm right this time) is that everything came over to the Pablo as uncompressed 2K frames, which were created by the assistant editor. That in itself is not that tough on storage (other than the copying time, of course), as a two hour movie would still be considerably less than 2TB total, especially with no handles.
Another plus to point out is the rapid changeover of the theater and hardware from "Fincher mode" into other projects. Not only could they all happen in the same sound stage... they could switch back and forth without compromise.
I don't quite understand that statement. What are you referring to?