Often, it's because starting something is easier than seeing it through. Fan fiction authors might have an initial burst of inspiration but then struggle to maintain that momentum. Sometimes, they might even set overly ambitious goals for themselves that are hard to achieve and end up giving up.
There could be many reasons. Maybe the authors lose interest, run out of ideas, or have real-life commitments that get in the way.
One main reason is that writing fan fiction can be a hobby, and sometimes people's hobbies change or they don't have enough time to continue. Also, they might face writer's block or not get the expected feedback and motivation to finish.
Maybe they want to escape from the real world of the bar for a while. Fiction books can offer them different adventures and stories that are far from the daily hustle and bustle in the bar.
To introduce classic stories to a younger audience.
One reason is that it allows them to give their favorite characters new adventures or develop relationships that weren't shown in the original. It's a way for fans to express their creativity and imagination within a familiar world.
Maybe it's because the quality varies a lot and some are poorly written.
That's a broad generalization. Fan fiction quality varies. Some might have weak plots or poor character development, but there are many well-written ones too. It often comes down to the effort and passion of the author.
Another possibility is that he got distracted by other projects or ideas. Dickens was a very creative person, and he might have come up with a new story idea that he found more exciting or relevant at the time. So, he shifted his focus away from the unfinished novel to pursue this new concept.
Copyright. Fan fiction uses elements of existing works which are copyrighted. So it can be seen as illegal use of intellectual property.
People like fan fiction because it allows them to explore the worlds and characters they love in new and different ways. It gives fans a chance to continue the stories they are passionate about, adding their own creativity and interpretations.
Maybe it's because the characters or plot in fan-fiction don't match your expectations or preferences.
Well, writers could hate fan fiction for a few reasons. Maybe they think it takes away from the uniqueness of their creation or that it doesn't meet their standards of quality. Also, there could be concerns about legal issues if the fan fiction is too similar to the original work.