Perhaps because sometimes it works. There is much being made of the HBO remake of James M. Cain’s Mildred Pierce, for example. It's a big deal. Unfortunately more remakes come up short than succeed. There are successes, though. Purple Noon (Plein Soleil) was the first film made of Patricia Highsmith’s The Talented Mr. Ripley. In 1960 Alain Delon launched his career playing the role that Matt Damon would reprise for an American audience in 1999. In my mind, both films deserve the critical praise they received. And what a great pairing for a lovely, if cynical evening at home — a little wine (American or French or both) and a few hours devoted to bitingly clever and stylish filmmaking.
Incidentally, if you’re viewing The Thin Man series, Martinis are the way to go.