Why did Xu Xian choose not to renew SM?

Seohyun always wanted to be an actor, because his expected development route could not be discussed with sm. She also said that she likes musicals because she can combine singing with acting. It seems that I also mentioned that I didn't expect to release a solo album when I was in solo (there is doubt here, I can't remember the source), and I didn't know until the company mentioned it. Although the singing skill has been improved, it obviously focuses on music singing. I don't know what plans and positioning sm has for her, but except for the first musical given by sm, all the other musicals were written by Seohyun herself and even made the news. Seohyun's film and television resources were released only last year, and they are all soy sauce dramas. It was not until the beginning of the year that solo appeared in a variety show and had a unique interview that everyone knew Seohyun's acting skills, and then there was the heroine of the weekend play. As an old fan of Seohyun for many years, I always hear that Maknae is rich in resources. M likes her very much. She is not the reason why the three lead singers joined the team when they were young. I am very helpless at this time. Please go and have a look. Seohyun, an adaptation of the American TV series A Boy Live, is definitely worthy of her weight. Whether she leads the dance with all her strength in the front row, sings her own high notes, or silently harmonizes with the contestants, everything she gets is worth it, but S? M really limited her acting development. I don't want to mention the incident of 1 1. That year, the group was thriving and she was also a beneficiary. But isn't the Busan trip of 15 still being pushed back? Can this situation improve while she remains young? I'm sure Seohyun is well aware of this.