by the fact that at all points the customers that the company has contact with (and knows how to contact) prefer film. And at all points the people who work with film have better economic opportunities. (Larger sales, higher profits, all stuff that is hard to ignore.)

This is why the only successful strategy for disruptive innovations seems to be to start a spin-off, and then after the disruptive wave is well established, re-merge. However even with that you have to be careful - you can't subsidize the spin-off very much. If it is subsidized, then it becomes dependent on the subsidy and will find it hard to succeed.

The Innovator's Solution has more to say about this, but it boils down to the maxim, "Good money is impatient for profit but patient for growth. Bad money is impatient for growth but patient for profit."

Cheers,
Ben