&gt; What would be interesting is a framework that allows you to run the entire microservice stack in a single interpreter (shouldn&#x27;t be hard with flask blueprints) and break off the subapps as necessary when the need arises.<p>The idea behind microservices is to have small services running on their own processes and communicating using a light-weight mechanism. This means you could write a service in Java, another in Python, Node.js etc. (i.e. pick the most appropriate language for the task)