Scenarios where configuration will be injected only into services and components work well with the APP_INITIALIZER technique. If however we need to configure an application consisting of multiple modules, with each requiring configuration, even partial configuration, then an alternative is necessary.

The APP_INITIALIZER token in Angular can also be used to delay the bootstrapping of the application for Angular Universal

How to change your web application from compile-time configuration to runtime configuration using the APP_INITIALIZER token

Although the standard out-of-the-box Angular application makes it easy to create and configure options for your application using 'environment' files, this approach has a few issues

You're probably familiar with the famous Russian dolls. But have you heard about their infamous cousins, the Babushka user stories?

Too many Agile teams make the mistake that the purpose of a sprint is to produce two weeks worth of work. It isn't. The well-planned sprint is a focused collection of activities to achieve specific goals or produce pre-agreed deliverables.