There is some small truth to this - at least for image acquisition. The bayer filters in modern digital sensors are way to broadband, which perhaps counterintui

There is some small truth to this - at least for image acquisition. The bayer filters in modern digital sensors are way to broadband, which perhaps counterintuitively reduces saturation, but more importantly reduces color accuracy from human perspective. This is especially apparent in the green-red spectrum. The sensitivity curves of Kodachrome 64 and presumably 35mm film stock much more closely match CIE 1931 effective bandpass curves and results in much more accurate color. However, most this can easily be fixed in post with modern tools. Almost all of what you are seeing today is artifacts of the Director/cinematographer/editor's artistic choices and not the acquisition tech.