And the violence was quick and over. Both Walter and Phyllis were shot, but it wasn't a hospital manual on a bullet wound. Maybe it is better now that violence is "more realistic". But that just means out of a super-hero movie 66% of it is just stupid ass CGI-fights.
Double Indemnity shoves a lot more desire and deceit into it's 107 minutes than most superhero movies to into two and a half hours.