Listening and design research are crucial aspects of a designer's job, but there's a balance to be struck between gathering insights and taking decisive action based on those insights. While conducting an extensive number of interviews, such as 150, may seem excessive for many types of apps and products, it becomes necessary for complex, professional-grade tools like Replay's time-traveling debugger. This tool aids coders in understanding and debugging software, which requires navigating a myriad of unique software development challenges. Unlike simpler design tasks, the product's complexity demands a deep understanding of diverse user needs and configurations, as it helps users navigate their code rather than focusing on basic design elements like button placement or UI colors. This presents a significant design and engineering challenge, akin to helping users understand their code as Google Maps helps users navigate geography, requiring innovative design research methodologies to address the complexities involved.