Managing an SDK in production over several years is similar to taming a multi-headed beast. Each aspect of the development process demands unique attention and precision. Balancing the evolving needs of a diverse user base, adapting to the ever-changing technology landscape, and ensuring consistent, high-quality performance across various environments presents a complex array of challenges. This article distills the key lessons and strategies we've honed from years of experience in maintaining and evolving our SDKs in a dynamic and demanding technological ecosystem.