It’s an inexact science, starting out from a point very, very far from where the color really ought to be. It’s a miracle we even get something close.
I’m sorry CatBus but I don’t have the time, energy, or willpower to explain everything wrong with what you’ve just said. Send me a PM if you like.
What I will say about film is that I think it’s fair to say that now we can fully reproduce it digitally with all detail in the film. It took time, but the technology is advanced enough now. In fact the best Bayer equipment now rivals RGB for quality, and I mean that it gets very very close, something that no one thought was possible a few years ago.