The Java SecurityManager is being removed due to its inefficiency, complexity, and lack of relevance in modern security frameworks, including zero trust. Its removal aims to improve the overall security posture of the Java platform by providing more effective mechanisms for securing client-side and server-side code. Developers are advised to transition away from using deprecated APIs and instead use alternatives such as the Foreign Function and Memory API (FFM) or tools like Snyk to monitor and fix vulnerabilities in their projects. Writing secure code from the get-go is also essential to minimizing vulnerabilities, and developers should acquaint themselves with Oracle's Secure Coding Guidelines for Java SE. The removal of the SecurityManager is a positive step towards making the Java platform more secure and less superfluous.