R&D decisions are based on return on investment - how much additional profit you can make by selling the new product, against the cost to introduce it.
Or, how much profit can be preserved by remaining competitive- i.e., the competition has improved their product or come out with a new one which is cutting into profit from your product.
I do use a digital device in my photographic pursuits when necessary.
When someone rags on me for using film, I use a middle digit, upraised.
Oh my! Wild-eyed dreamers, or perhaps fools who've bought the business school bilge.
I've done business cases, I've forecast demand, I've done marketing studies, ... Yes, the proposed product has to work, but after that its all informed guesswork.
I once did a little consulting job for the Nicaraguan 'phone company, questioned their forecast of revenue per line. "Pues, tiene que tener fe" Well, you have to have faith.