The decision to split the final Harry Potter movie, "Harry Potter and the Deathly Hallows," into two parts was made to do justice to the depth and complexity of the source material. By splitting it, the filmmakers were able to include more of the intricate details from the book and ensure a more faithful adaptation. While it may have been possible to make the film as one long movie, it would have been extremely lengthy, potentially leading to viewer fatigue or a loss of attention.
Furthermore, by splitting the movie into two parts, it allows for deeper character development and a more comprehensive exploration of the plot. It can provide a more immersive experience for the audience, allowing them to fully engage with the story and its resolution.
Regarding the length, each part of "Harry Potter and the Deathly Hallows" is about 2 hours and 15 minutes long. So, if they were combined into a single film, it would indeed be close to 4 and a half hours long, similar to the length of "Titanic" in 1997. While some viewers may enjoy longer movies, it can be a challenge for others to stay focused for such extended periods.
As for the end of the Harry Potter film saga, it is indeed a bittersweet feeling for many fans. The series has captured the hearts and imaginations of millions of people worldwide, and saying goodbye to beloved characters and the magical world they inhabit can be emotional. However, the end of one chapter often signals the beginning of new adventures and stories, and the legacy of the Harry Potter series is likely to endure for generations to come.