Explore the history, evolution, and current state of Cross-Site Scripting (XSS) vulnerabilities in this provocative keynote address from OWASP AppSec EU 2018. Delve into the origins of XSS dating back to 1998, examining past attempts to mitigate the issue and their subsequent failures. Analyze how web infrastructure and monetization have contributed to the persistence of XSS, drawing parallels to other human failures. Gain insights into potential future developments and industry-wide challenges in addressing this long-standing security concern. Evaluate the effectiveness of various tools, techniques, and approaches used to combat XSS, including Content Security Policy (CSP), sanitization, and bug bounty programs. Reflect on the broader implications for web security and the responsibilities of developers, organizations, and the security community in tackling persistent vulnerabilities.