Should We Upgrade to Rails 5?

Ruby on Rails version 5.1.1 is officially out and in use. While the latest release on May 12th was a minor one, version 5.0 brought some major updates to Rails – including new JavaScript abilities with Yarn and webpack, system tests with Capybara, encrypted secrets, and more (click here to read the full Rails 5 release notes).
You may have discussed upgrading your Rails app with your internal team. Using this new version is a no-brainer for a new project, but should your team take the time to upgrade your existing Ruby on Rails app?