
This topic seems like a false proposition, because I think Keil is not very difficult to use, except for frequent lag, inexplicable freezes, and lack of flexible expansion.
In fact, as an embedded software development tool, Keil has a long-standing presence and wide application in the industry. Although some people believe that Keil has some usability challenges, the reasons it hasn’t been phased out might include the following:

Why Hasn’t Keil Been Phased Out Despite Its Challenges?

Keil has a long history, having been launched in the 1980s. Over time, it has accumulated rich experience and a user base, establishing a good reputation and brand influence in the embedded development field. When I learned about 51 microcontrollers, I spent a whole day setting up the environment, and back then I installed Keil.

Keil provides a complete ecosystem, including an Integrated Development Environment (IDE), compilers, debuggers, and emulators. Developers can complete the entire development process from coding to debugging and testing on the Keil platform without switching between multiple tools. Personally, I really like its register observation window, which makes debugging bugs very convenient.

Keil supports a variety of microcontroller series and chip models, covering most common microcontrollers on the market. Whether it’s STM32, 8051, or other series, Keil can provide corresponding development support to meet the needs of different users, and many domestic chips are also supported.

Keil provides comprehensive technical support and resources, including official documentation, tutorials, and community forums. Developers can get timely help and solutions when encountering issues while using Keil, which improves development efficiency and user experience. You should know that the problems you encounter will likely be faced by hundreds of others.

Keil integrates compilation, debugging, simulation, and other functions, simplifying the development process and improving development efficiency. Additionally, after long-term development and iteration, Keil has become quite stable and reliable, able to meet the needs of most projects.

Due to its long history, complete ecosystem, excellent technical support, and other reasons, Keil has become one of the standard tools in the embedded development industry. Many companies and organizations prioritize Keil when developing embedded software, further solidifying its position in the industry.

Many embedded developers have become accustomed to using Keil for development and are very familiar with its interface and features. Additionally, some projects have high requirements for the stability and reliability of development tools, so they are reluctant to easily switch tools.

Keil closely collaborates with many hardware vendors, providing targeted development tools and support, enabling developers to more easily integrate hardware and software development. This deep integration can significantly improve development efficiency and project success rates.

The Keil team has been committed to improving and updating products, continuously optimizing user experience and features. As technology continues to develop and market demands change, Keil will also launch new versions and features to maintain its competitiveness and leading position.

Many projects have been established on the Keil platform, and changing tools may require relearning and adapting to a new development environment, which may involve certain migration costs and risks. Therefore, some developers prefer to continue using the existing Keil tools rather than easily change them. From what I understand, many small domestic companies still use unauthorized versions. If anyone wants to switch to the brand new CubeIDE, they can refer to this article..《ARM Copyright Warning, If Keil Fails, Switch to STCubeIDE》
Although some people believe that there are some difficult aspects of Keil, the reasons it hasn’t been phased out are mainly due to its long history, robust ecosystem, support for various chips, comprehensive technical support, high integration and stability, industry standard status, user habits and stability requirements, deep integration with hardware development platforms, continuous improvement and updates, as well as compatibility and migration costs.
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