Creative Differences: Meloni had expressed his desire to explore other acting opportunities and felt that his character, Detective Elliot Stabler, had run its course. He also felt that the show had become too formulaic and predictable, and wanted more creative freedom.
Personal Reasons: Meloni was reportedly exhausted from the demanding schedule of filming SVU and wanted to spend more time with his family. He also felt that he had accomplished what he could with the character and was ready for new challenges.
Replacement Concerns: NBC was also concerned about the potential impact of losing Meloni on SVU's ratings and legacy. Detective Stabler had become one of the most iconic characters on television, and fans had a strong emotional connection to the show and its central characters.