As Ruby on Rails 7 is the latest version of the popular web application framework, and it includes a number of new features and improvements. Here are some of the key features that you can look forward to when using Rails 7:

Action Mailbox: This new feature allows you to route incoming emails to controller-like mailboxes, where you can process them and take further action. This makes it easy to build applications that interact with email in a more automated way.

Action Text: This feature provides rich text editing capabilities for your applications, making it easy to create and edit formatted text. It uses the Trix editor, which is a lightweight and flexible WYSIWYG editor.

Multiple DB Support: Rails 7 now supports working with multiple databases in a single application, which can be useful in certain situations where you need to scale horizontally.

Parallel Testing: This feature allows you to run your test suite in parallel, which can significantly reduce the time it takes to run your tests.

Action Cable Testing: Action Cable is a feature that allows you to build real-time features into your applications, and Rails 7 now includes support for testing these features.

Custom Action Options: You can now define custom options for your controller actions, which can be used to specify additional behavior or requirements.

Time Zone Support: Rails 7 includes improved support for working with time zones, including the ability to set a default time zone for your application.

Overall, Rails 7 includes a number of new features and improvements that make it easier to build and maintain high-quality applications. If you're using an earlier version of Rails, upgrading to Rails 7 is definitely worth considering.