Progress with RT 5.9 Film Negative

Thank you for your explanation. I want to ask if there is a recommended approach for adjusting contrast?
Currently, I have noticed that the built-in bundled profiles “film negative” uses an “S” curve in the exposure module’s tone curve (I have been emulating this method).

However, in your recent example, you utilized tone curve in color management camera profile( maintaining a linear tone curve in the exposure module), along with the reference exponent in the film negative module. So, I am wondering, do you currently recommend the latter method more?