Let's get back to the discussion of regrading a source to approach some kind of reference, with only limited resources aka reference frames. Take this frame from Raiders of the Lost Ark for example.

Bluray:

35 mm frame:

We can match the bluray to the 35 mm easily:

However, if I were to ask you to regrade these two frames from the same location to look like this 35 mm frame:

Would you be able to do it? How much time would it cost?

This is what you get from the prediction, in about 20 seconds:

First of all, I think they look stunning, but more importantly, they look like frames from a 35 mm print, consistent with the reference.