(on the possibility of a "Boutique Kodak" spinoff)
I don't think the reasons are "obscured from us"---they've been discussed here frequently. When your infrastructure is scaled for extremely-high-volume production, it's somewhere between "difficult" and "impossible" to ramp down to boutique scale.
Assuming film sales don't stay at a level that justifies continued production at Kodak's scale, it kind of seems like the best outcome is that they spin off their formulae and some of their considerable "secret sauce" knowledge to an operation built from the ground up to run at a smaller scale. I don't know who that would be, though.
-NT