Kakao has recently overhauled its messaging app, KakaoTalk, for the first time in 15 years, aiming to improve user experience. However, the update has faced significant backlash, with around 42 percent of users expressing dissatisfaction. Critics have raised concerns about the app's new design, which resembles Instagram, and features like the automatic display of friends' photos have sparked privacy worries. Kakao's leadership, including CEO Chung Shin-a and chief product officer Hong Min-taek, maintain that the changes will ultimately benefit users, despite facing opposition from engineers and developers. Following the update, Kakao's shares fell by 6.17 percent, resulting in a loss of approximately 3.4 trillion won in market capitalization.