Analysis of SOLID Principles and Embracing Simplicity in Elixir

Chris Keathley presents at ElixirConf 2022, highlighting the challenges of traditional software patterns like SOLID which, while intended to aid engineers, often fall short in aiding code comprehension and adapting to change. He argues the cost of changing code can be high, and SOLID principles aim to reduce this by managing complexity. According to Keathley, deep layer modules that encapsulate complexity are preferable to shallow layers. He claims software design is about managing complexity, noting that every line of code adds a cost that must be justified by significant value. Keathley suggests employing Elixir's capabilities for creating extendable applications, leveraging polymorphism and inversion of control through functions, protocols, and behaviors, to build systems with fewer components. He emphasizes the importance of clear, complete functions, encapsulation of complexity, and questioning conventional wisdom to create simpler, more adaptable software systems.