in what way is ESB 70mm “lost”
I believe they are referring to this cut never being officially released
https://www.starwars.com/news/empire-at-40-star-wars-the-empire-strikes-back-ending-changes
as well as some alternate takes (e.g. Vader’s “oof” when Luke kicks him during the duel, and “You were lucky to get out of there” (70mm) vs. “You’re lucky you don’t taste very good” (35mm), inexplicably changed to the take from the 70mm for one of the Special Editions, but some alternate takes of various lines have never resurfaced other than via cassette recordings (if I recall correctly).