Achieving high availability, specifically five nines or 99.999% uptime, is not just about investing in infrastructure but fostering a culture that prioritizes reliability alongside feature development. At Gremlin, this is accomplished through three key practices: regular and automated testing, shared responsibility for reliability through on-call rotations, and fostering accountability by openly discussing reliability metrics in team meetings. Regular testing helps identify potential failures before they become incidents, while on-call rotations ensure all engineers understand the system's complexities and potential points of failure, motivating them to proactively address issues. Open discussions about reliability metrics encourage a culture of continuous improvement and accountability without blaming individuals, thus integrating reliability into the organization's core operations. Gremlin's approach demonstrates how cultural shifts, rather than just technical solutions, can enhance system reliability, bringing organizations closer to achieving exceptional availability standards.