Discover how GitHub is making its massive Ruby on Rails monolith accessible in this RailsConf 2023 talk. Learn about automated accessibility scanning, preview-driven development, and an accessibility-first form builder. Explore the challenges of updating a 15-year-old application with 1,400 controllers to meet modern accessibility standards. Gain insights into different types of accessibility needs, including situational, temporary, and permanent. Understand the principles of universal design and how they can be applied to web development. Engage with the speaker's approach to creating more inclusive digital experiences and participate in a Q&A session to deepen your understanding of accessibility in large-scale web applications.