Kotlin has gained significant popularity, especially since Google endorsed it as the preferred language for Android development. Its concise syntax, null safety, and interoperability with Java make it an attractive choice for developers seeking modern programming features. Many companies have adopted Kotlin for new projects due to its improved productivity and fewer lines of code compared to Java. However, Java maintains a strong foothold in enterprise-level backend systems, legacy applications, and large-scale enterprise solutions. Additionally, Java has a vast ecosystem, extensive documentation, and a large global developer community, making it hard to replace entirely. While Kotlin usage is likely to grow in mobile development and among startups, Java will likely remain dominant in enterprise applications for the foreseeable future. For those looking to future-proof their skills in both traditional and modern development environments, enrolling in a full stack Java developer course by the IoT Academy is a strategic and practical step forward.