This document discusses why Ruby on Rails is a productive framework from the perspective of a .NET developer. Some key advantages of Rails according to the document are: 1) Scaffolding allows generating controller actions, views, models, and database schema with one command, saving development time. 2) Rails makes routing, email handling, and AJAX implementation easy and intuitive. 3) Rails supports three environments (development, test, production) out of the box and includes migrations for database changes. 4) Rails has a rich ecosystem of plugins and gems that can be easily installed to add common functionality.