unnecessary blu ray double or triple dip movies

[James_Younger_Gang]

Sometimes, buying a movie on blu ray twice or thrice has its uses due to new special features, day and night improved video and audio quality. But sometimes there are cases in which buying the movie just once is enough. Sometime I notice before buying the movie again, but sometimes I buy it again and then realize that I shouldnt have bought it. Which blu ray double dips do you consider unnecessary? Young Frankenstein is one example. The first blu ray release was just fine and the second release had no new features. Any other examples?