TServo2049 said:

The colors really remind me of the screenings of Close Encounters of the Third Kind and The Blues Brothers that I recently attended at the Paramount Theatre in Oakland, CA.

Both of them seemed to be modern LPP prints, and CE3K was the late-90s "Director's Cut" restoration, but they both had similar color timing to this. Lots of green and blue in the shadows/darker midtones, slightly off-white/pinkish whites, etc. (And like these images, they seemed to be a tad dark/dim, as if the projector's light source wasn't bright enough. No slight to -1, I know the brightness/contrast/gamma will be corrected later.)

My point is, with the higher resolution and improved compression, I can finally appreciate the quality of this print. I could imagine seeing an LPP print projected in a theater, looking like this.

I think you're close to answering a question I've had for a while. That is: what makes a color film from the 70s (and, possibly, earlier) look like a color film from the 70s? There seems to be a set of difficult-to-identify qualities that, when combined, result in the warm magic we see in the PuggoGrande and in -1's images.