I would read it as past-past means the frame of relevance is gone in the past - no one cares how many people know the plot nowadays. In case of past-present I would read it as the folm was so significant that even after 45 years people (not even concieved at the time of the premiere) know the plot from the omnipresent discussion of it.

I think the past - past emhasizes on the fact Jaws were a hit and millions saw it "fresh" and made fuzz around it so intensively that those who didn't see it at the time were introduced to the plot anyway. Now, Jaws are yet another film from 70s and there is no fuzz about it.

"Yes, she is" would be my answer for both questions.

@nnnnnn I think that the man from burial services must be happy during hearing good news... en.bugemos.com/?q=node/4 . Note that "Schwab" is transscripted as "Šváb" which is "Cockroach" in english. And the donkey was genetically modified.