Explore the critical security risks posed by end-of-life equipment and legacy systems that harbor unpatchable vulnerabilities, known as "forever-day" flaws, in this conference talk from BSidesLV. Examine how these obsolete systems create persistent threats to national security, public safety, and economic stability across critical infrastructure sectors. Learn from cybersecurity experts Silas Cutler, Paul Roberts, and Stacey Higginbotham as they discuss the widespread presence of EOL equipment in essential services and the cascading risks these systems pose when they can no longer receive security updates or patches. Understand the implications of maintaining legacy technology in an increasingly connected world and discover strategies for addressing these systemic vulnerabilities that could potentially impact lives and livelihoods.