华为老粉称被鸿蒙 5 坑惨！升级不兼容，回退丢失数据。华为回应：视频创作者等群体慎更新

Core Viewpoint - The article discusses the issues faced by users after upgrading to Huawei's HarmonyOS 5.1, highlighting compatibility problems with mainstream applications and the challenges of the new operating system architecture [3][5]. Group 1: User Experience Issues - A user reported three major problems after upgrading to HarmonyOS 5.1: desktop software became unusable, key features in apps like WeChat and Douyin were missing, and the inability to uninstall the new OS led to data loss during a system rollback [5]. - The upgrade process involved replacing the previous HarmonyOS 4.3 with a completely new version, which caused compatibility issues with existing applications [5]. Group 2: Technical Insights - Huawei's customer service indicated that HarmonyOS 5 is fully self-developed and no longer based on Android, necessitating a redesign of applications for compatibility [5]. - Although 80% of application functionalities have been restored, some features are still under development, particularly for content creators, who are advised against upgrading to HarmonyOS 5.1 at this time [5].