She's just progressively talked less and less and less for the sake of avoiding media scrutiny. She was reckless in her DC days, she tightened up at the beginning of her solo career, and now she thinks very carefully about every word she chooses.
Talking in front cameras isn't the same as talking conversationally. For a perfectionist with Beyoncé's degree of stardom, I imagine it's one of the worst things in the world. No wonder why she stopped giving interviews in 2013.
I love her and all but I can see why she doesnt do interviews.
I decided is my fave of hers