******SUSPICIOUS SPOILERS!****** I have to admit, I took the bait on this one.  Last month, I saw an interesting online trailer for Netflix’s “Leave the World Behind” (2023), based on a book by Rumaan Alam, who cowrote the screenplay with director Sam Esmail.  Starring Oscar winners Julia Roberts (“Erin Brockovich”) and Mahershala Ali (“Moonlight”), along…