1. Modular design: One of the most notable benefits of Marionette.js is its modular design, which allows developers to structure their application into smaller, reusable components. This makes it easier to manage the code and increases the overall maintainability of the application. 2. Robust views: Marionette.js provides a set of robust view classes that make it easy to render templates, handle events, and manage UI components. The view classes offer a lot of flexibility and can be customized to meet the needs of specific applications. 3. Event aggregator: The event aggregator feature in Marionette.js provides a centralized event management system, making it easier to manage communication between different parts of the application. This helps to maintain a clean and organized architecture and reduces the likelihood of event handling conflicts. 4. Regions: The regions feature in Marionette.js allows developers to control the layout of the application and manage where and how views are rendered. This helps to create a clean and organized UI, and makes it easier to manage the flow of data and information in the application. 5. Backbone.js compatibility: Marionette.js is built on top of Backbone.js, which means that developers who are familiar with Backbone can start using Marionette quickly and easily. Additionally, Marionette provides a number of additional features and tools that are not available in Backbone, making it a powerful and flexible choice for building complex web applications. Overall, Marionette.js is a well-designed and feature-rich framework that provides a lot of benefits and advantages for developers looking to build complex and scalable web applications.

First of all a short disclaimer - this is a review for Marionette.js (the good old one as an enhancer for Backbone.js), but even Marionette (aka v5 without Backbone dependency) is quite nice. Those long years ago I worked with Backbone that big M saved even not hours, but days and weeks on feature development. And maybe weeks on debugging and problem-solving. Most important for me were two things: - work with collections (nested collections too) - simplified routers handling (at my first Backbone project I created dozens of zombie views) Both are about views and creating/mounting components. That presentation layer became much more simple and easy to understand, even for newcomers on the project, who never worked with backbone it was easy to follow rules, which were set up once.

The different kind of views that are available which makes the job easy while structuring the page and divide the responsibility. Something we were missing in backbone.