Here's why:
* Vastness of Film History: There are countless movies made throughout history, and it's challenging to keep track of every single film and its cast.
* Data Accuracy: Even with databases, information can be incomplete or inaccurate. Some films may not have complete credits listed, or there may be discrepancies in how credits are assigned.
* Defining "Movie": What constitutes a "movie" can be subjective. Do we include short films, documentaries, TV movies, etc.?
Samuel L. Jackson has an incredibly prolific career, having starred in hundreds of films. While some actors might have a higher number of credits due to starring in more smaller or independent films, it's very likely that Jackson holds a place among the actors with the most film credits in Hollywood.
Instead of focusing on a specific number, it's more accurate to say that Samuel L. Jackson is one of the most prolific actors in film history, with an extensive and impressive filmography.