JHipster equivalent to Rails? You have to be joking, surely. I just setup a JHipster site and when I opened it up in IntelliJ it was the same labyrinthine mess I've come to expect from Java frameworks, ie. knee-deep in endless subdirectories and everything abstracted away to the point of incomprehension. Contrast that with the simplicity of Ruby and Rails. Java by its very nature makes it impossible to build simple, easily comprehended frameworks and apps. The trouble is that devs who have spent most of their lives in the Java ecosystem can only think relatively, ie. Java Framework X is simpler than Java Framework Y. Unless they expose themselves to something like Ruby or Clojure they will never experience true simplicity.

> hiding complexity

This makes me shiver in terror.

Spring Boot hides needing to deploy to an application server along with the extra configuration that entails, it doesn't hide Spring from you.

There's still a ton of "enterprise-grade" shit in Spring, you just aren't forced to use it if you don't want - but it's always there, lurking behind the scenes.