Donut, a 500,000-reader daily newsletter aimed at Gen Z, recently transitioned from WordPress to Gatsby to enhance performance and SEO. The move was driven by co-founder Matt McDonald's desire for a modern technical stack that could support their ambition to become a content machine. Gatsby's platform allows Donut to optimize SEO, such as using pagination over infinite scroll and improving load times by altering design elements, like switching to CSS gradients for backgrounds. The website's main conversion tool is a full-screen quiz that recommends newsletters based on user responses, effectively increasing engagement through gamification. Gatsby's component-based static queries improve code quality by co-locating queries with components, avoiding the violation of separation of concerns. Additionally, Donut uses Gatsby Functions to power a personalized ambassador program, encouraging subscribers to promote the newsletter through a point-based referral system. McDonald expressed satisfaction with Gatsby's features, highlighting its positive impact on their operations.