In the "Break Things on Purpose" podcast episode featuring Subbu Allamaraju, a Senior Technologist at Expedia, he discusses his journey and insights into Chaos Engineering and system reliability. Allamaraju shares his experience in scaling cloud infrastructure and leading Expedia's cloud migration efforts, emphasizing the importance of understanding system safety and reliability. He recounts his study of 1,500 incidents at Expedia to identify patterns and root causes, finding that 70% of incidents were triggered by changes, highlighting the need for safe release practices and better architectural compartmentalization. Allamaraju argues for the necessity of forming hypotheses in Chaos Engineering rather than random testing, stressing the importance of understanding business value and trade-offs in engineering decisions. He advocates for looking at incidents as feedback rather than failures, fostering a culture of learning and adaptation. The conversation also explores the challenges of deploying changes in complex systems, the importance of understanding business metrics, and the value of building confidence in deploying software safely.