Elevar's experience migrating StriVectin from Magento to a Gatsby and Shopify framework underscored the advantages of using Storybook in conjunction with Gatsby to support a modular design process. By isolating UI component development with Storybook, the team could focus on creating and testing React components without being bogged down by early decisions regarding hosting and content management systems. This approach allowed them to delay significant technical decisions, enabling flexibility and reducing complexity during the project's initial phases. Despite some challenges in integrating user experiences like account management and checkout between Gatsby and Shopify, the modular strategy facilitated by Storybook allowed Elevar to efficiently prototype and iterate, eventually leading to a successful outcome that satisfied the client. The process emphasized the importance of focusing on component design and functionality first, which streamlined the transition of components into Gatsby pages and ultimately enhanced the project's quality and client satisfaction.