As with everything, styles change as does technology. "Back in the day" film crews were incredibly disciplined, but, then again, they had to be; anyone who made noise on the set was dismissed. Room-tone as we understand it in the digital age did not exist 25 years ago, because dialog "editing" was immensely different - you either replaced it (looping) or you didn't, and the room tone was the blank space between lines, augmented by tape hiss.
These days directors seem to favor the up-close-in-your-face closely miced dialog sound. Why? Because it's much easier to keep present in a dense mix and it has greater intelligibility. Up until the early 50's you had, at most, four audio tracks to play with - dialog, Foley/sound FX and music. Now you can have well over 1,000 audio tracks.
Also keep in mind that today many filmmakers prefer to film on location; back then most work was done on sound stages, so audio control issues are very different.
So you are comparing apples and cell phones. If you like the old sound, record that way with a Neumann and a Nagra - on a sound stage with a union sound crew.