The document discusses Netflix's transition from a monolithic Java application running on Oracle databases to microservices using multiple languages like Java, Python, and JavaScript. It describes how Netflix developed NEWT (Netflix Workflow Toolkit) to provide a consistent development experience for all languages. NEWT simplifies tasks like packaging, building, and deploying through commands that isolate tool environments and versions. This unified approach reduced complexity when adopting new languages and allowed Netflix to treat applications similarly regardless of the underlying technology.