Huawei's HarmonyOS has achieved a remarkable milestone, powering over 55 million devices as of March 2026. This achievement is a testament to the company's success in challenging the dominance of Apple and Google in the personal tech market. The rapid adoption of HarmonyOS can be attributed to its continuous improvements, particularly in its latest release, HarmonyOS 6. The operating system now boasts fluid animations, measurable performance enhancements, advanced AI assistance tools, and an improved security architecture. These features have made HarmonyOS a popular choice for users seeking a smooth and feature-rich experience. However, the success of HarmonyOS also raises questions about its impact on the open-source community and the future of mobile operating systems. From my perspective, the mass adoption of HarmonyOS is a significant development in the open-source landscape. It encourages contributions to the OpenHarmony kernel and fosters growth in related projects like EulerOS. This is particularly interesting because it challenges the traditional duopoly of Apple and Google, offering consumers more affordable and feature-rich devices. What makes this development even more fascinating is the role of Huawei's hardware. The success of HarmonyOS is closely tied to the quality of Huawei's devices, which have become increasingly competitive in the market. This dynamic raises a deeper question about the future of mobile operating systems and the role of hardware manufacturers in shaping the open-source ecosystem. In my opinion, the success of HarmonyOS is a positive development for consumers, as it keeps all makers involved on their toes. It also highlights the potential for open-source operating systems to gain traction in the market, particularly in regions where domestic software is gaining popularity. However, the catch is that HarmonyOS still relies on proprietary layers, such as the Ark compiler and UI elements. This raises concerns about the accessibility and sustainability of the project in the long term. Additionally, the Chinese documentation of HarmonyOS makes it inaccessible to a large chunk of the world population, which is a significant limitation. One thing that immediately stands out is the criticism surrounding Huawei's approach to open-source projects. Some people view Huawei's efforts as intrusive, while others find them acceptable as a means to bring more apps and services into the fold of their OS. In conclusion, Huawei's HarmonyOS has achieved a remarkable milestone, powering over 55 million devices. This success has significant implications for the open-source community and the future of mobile operating systems. While it offers consumers more affordable and feature-rich devices, it also raises questions about the sustainability and accessibility of the project. From my perspective, the success of HarmonyOS is a positive development, but it also highlights the need for a more inclusive and sustainable approach to open-source projects.