(In reply to Wazzles’ post):
From Zombie’s article on the subject over at Saving Star Wars:
By 2020, it will be pink, but salvageable, but all release prints would basically be unwatchable as-is, even Return of the Jedi’s.
I know the real focus on this section was interpositives for telecine, but it seems a bit uninformed when it comes to LPPs. We’re damn close to 2020 and well cared for Jedi prints will look just as good as they do now, and as they have in recent years. As we’ve seen, even ESB in cold storage can have good color in this day and age. Though, that particular print may or may not succumb to mold by 2020.