Fascinating. Who would have thought that a film print would be such a uniquely valuable thing for AOTC?
Yeah, it is interesting. Whether it is just an artifact of how print film picks up those colors or intended and then later lost by getting stuck in early REC709 work flow post theatrical release there do seem to be colors that get chopped off by standard gamut for AOTC.
Here are some more examples of how it extends beyond standard gamut where I compare the 35mm left in wide gamut (ProPhotoRGB in this case) and then compare with the same frame converted down to standard sRGB gamut (same color palette as REC709 although different gamma tonal curve in the standard, but the latter part is not relevant here):
Here are some demos that show the differences between how AOTC looks when you have wide gamut color palette available vs. when it is restricted to sRGB/REC709 color palette (of course you need to use fully color-managed browser/viewer and have a wide gamut display set to wide gamut display mode with proper display profile installed in order to see the differences, and in some cases, to even see the WG labelled images properly at all). For each pair SG is first and WG is second (should be obvious on a properly set up wide gamut display):
