Definitely, ruby on rails allows developers to build incredible new and modern applications.
The more you know about new technologies and tools to develop, the better ranked you will be in the market. Everything is so competitive for developers nowadays that the more you know the better it will be for you.
Some of the greatest websites such as Airbnb use ruby on rails, so if you know it you will definitely have it in your favour.
Learning ruby on rails can be rather challenging, however there is a community on the web that helps you solve doubts and resolve issues.
The more you know, the better, always!