Explore the importance of browser engine diversity in a talk from View Source 2019. Delve into web compatibility, interoperability, and the web standards process as Mike Taylor examines the consequences of the declining variety in browser engines. Learn about the history of browser engines, the dominance of Chrome and Chromium, and the impact on web development. Discover practical steps developers can take to support browser diversity, including checking API support and reporting browser bugs. Gain insights into the challenges and opportunities presented by the current browser landscape, and understand why maintaining engine diversity is crucial for the future of the web.