This is very interesting as Phoenix could become the next Rails. I loved Rails and ruby, for the most part, but ruby MRI still lack 'Native Threading', and Jruby isn't viable if you are using external C extensions.

To overcome the lack, I've used Resque (or beanstalkd in PHP, which has the exact same problem) as a background job manager, but then I had to write my own layer and rely on the database to handle the 'job' result.

Which parts of the framework leverage the concurrency model, other than the routing/request handling part?