Declan Whelan, an expert in technical health and agile practices, dives into the nuances of software development. He reframes 'technical debt' as 'technical health,' emphasizing proactive measurements that enhance customer value. The conversation touches on the challenges of agile practices, the evolution of methodologies, and the shift from monoliths to microservices. Whelan also underscores the importance of team culture, advocating for collective code ownership and innovative practices like pair and mob programming to boost collaboration and product quality.