Kotlin is increasingly recommended for Android development due to its features such as null safety, asynchronous programming capabilities with Kotlin Coroutines, and improved readability and interoperability with Java, enabling seamless integration into Android apps. The choice to use Kotlin for an SDK development highlights its ease of use across both Kotlin and Java environments, although challenges such as handling callbacks and mocking in testing were encountered and addressed with solutions like the mockk library and functional interfaces. The distribution of the SDK was facilitated through platforms like JitPack, which aligns with modern practices of managing SDK versions via git tags rather than traditional package repositories like Maven Central. The narrative also touches on the progression of A/B testing practices, influenced by platforms like Optimizely and experiences at companies like Statsig, emphasizing the importance of experimentation culture and the evolution of product strategies through data-driven decisions.