With the added hassle (= cost) of having to ship master rolls, negotiate a contract, put QA and audit procedures in place, etc. You'd have to sell a lot of cans for all those costs to be offset.
99% of the "couldn't they just..." comments boil down to a lack of awareness of what it entails to run a somewhat large corporation. It's a little easier for SME's because they are generally more likely to dive into a new adventure not entirely aware of the risks and overhead.
Asking for more bulk rolls would only add to the economies of scale and it’s far from being a stupid Question.
Because they already 100/200/4001000-foot roll a lot of films, this would likely add to economy of scale... and they already have all the machinery and tooling.
Besides, not so long ago Kodak did offer Portra 160 NC, 160VC, 400NC and 400VC in 100’ rolls.
No, actually kodak’s reason for not bulk rolling might actually be total BS. They surely can do it, they’ve done it, and it surely could be made economically.
Let’s not forget who REALLY is Kodak: a Very Badly managed company. Like the worst.