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Unfortunately, there are some aspects of Flex that may be more challenging for novice developers, such as its deep integration with the ActionScript programming language and its requirements for the use of Adobe Flash Player. Additionally, Flex may require a more complex development environment, which can take time to set up and learn how to use effectively. Overall, while Flex can be a powerful tool for creating high-quality applications, it may not be the best choice for developers who are just starting out or who are seeking a more accessible platform for application development.