The Taylor Swift/Ticketmaster incident highlighted critical lessons in capacity planning and system resilience, as Ticketmaster's platform collapsed under the demand of 14 million users trying to purchase concert tickets, leading to widespread frustration and a class action lawsuit. Despite claiming "unprecedented demand," Ticketmaster's failure to anticipate and accommodate such traffic exposed significant technical shortcomings, including inadequate scaling strategies, reliance on outdated systems, and failure to address technical debt. The episode demonstrates the importance of proactive infrastructure planning, chaos engineering, and addressing bottlenecks to ensure systems can handle peak loads without failure. It serves as a cautionary tale for businesses to avoid complacency and invest in scalable, resilient technology to prevent similar public failures and the long-term reputational damage they can cause.