But Nikon, Canon, Hasselblad, Mamiya, etc., never made consumables, so I don't see how film cameras were different from the digital of today. It was two things that kept film cameras selling: More/better features and growing the number of users.
Granted, but the market was driven by the use of consumables. Without this consumables market there would be no demand for these cameras. It's like the old saying that "A chicken is an egg's way of creating another egg."
A rock pile ceases to be a rock pile the moment a single man contemplates it, bearing within him the image of a cathedral.