In this episode, Sean C discusses the importance of building a fit-for-purpose tech stack and the process of determining the needs of a business. He emphasizes the need to consider team capabilities and the interconnectivity of different systems. Composability is highlighted as a key factor in building a scalable tech stack, allowing for flexibility and the ability to interchange different platforms. The conversation also touches on the benefits of using Shopify as a platform, including cost reduction, lower development costs, and performance. The concept of composability is further explored in the context of expanding into new markets and sharing customer information between brands within a brand group. The episode concludes with a discussion on the importance of composability in adapting to changing markets and requirements.