wildimages@xxxxxxxxxxx writes:
....I've got fairly badly faded chromogenic materials from 30 years ago,
stored simililarly to what you describe.
This is not an accurate comparison, e.g., it's not keeping up with inflation. Everyone knew even then that color fastness was a huge problem. Archivally processed black & white fiber prints were never in question. But that too would an apples & oranges comparison.
The accurate comparison would be to current color print technology.
Peace! Sidney