But now there is another complication to an eventual reemergence of ruby on rails: the competition defeated the initial comparative advantage - i.e. the simplicity - of the RoR platform. The premises that justified RoR in the past are too weak today in my opinion. The framework was sold on how easy and no-nosense it was setting it up and start prototyping your commercial solution in a time where the competitors were awkward and epitomized by J2EE, where setting up and developing the most basic application was time consuming and complicated.
Today with Spring Boot, for instance, you can bootstrap and develop your app as quickly and easily as any other cool and alternative framework but with the advantage of using a really popular and fast language.
Technologies don't die quickly and COBOL and Perl are the living proof, but it's really hard to see a bright future for RoR and ruby and I think that most of their contribution was already given.