These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: The Unholy Three
Adaptation Displacement: Not many people know of these movies, but even less know of the novel of the same name that they were based on.
Harsher in Hindsight: The sound version ends with Chaney smiling and waving goodbye to the viewer, promising to send a post card. By itself, it seems like your standard Bittersweet Ending, but when you realize that this wound up being the very last shot in his very last film, it becomes something of a meta Tearjerker.
Mae Busch (Rosie in the silent version) would go on to be a frequent supporting player in the Laurel and Hardy shorts, and actually played Mrs. Hardy in their very first sound film, Unaccustomed As We Are.
Harry Earles (Tweedledee in both versions) would go on to play Hans in Freaks and (what would become his most well-known and recognizable role) one of the Lollipop Guild singers in The Wizard of Oz (he's the one in the blue shirt).
Tearjerker: Tweedledee's back story in the book. He really tried to rise above the mockery and be a good person, and the author does a very effective job of showing something dying inside him once he finally reaches his breaking point. Granted, in spite of this, it's very hard to feel anything other than contempt for him by the end of the book.