The idea with Ember-Data and Ember in general is the same as Rails: Conventions give you power. Conventions and a happy path are good. That said, until you _learn_ the happy path, it's harder going.

It's not 'baked in' because Ember is modular: Ember-data has all of that layer in it, so the rest of Ember doesn't have to care. That said, I disagree with your parent: you shouldn't be writing your own data layer.