Three or four times I've been about to pull the trigger and every time the things that's stopped me is that when I go to look for a sample project to have a read of an actual app using it in anger it seems impossible to find one that meets my criteria: 1. Uses current version of Ember. 2. Uses idiomatic ember. 3. Big enough to not be a toy, ember-data, being the recommended way of doing things, I want to see how it's formatted.
Every time a look it seems like everyone is saying something along the lines of "Here's a good example project except it's N versions old." or "… except it doesn't use insert-feature-that-docs-heavily-recommend-using because that wasn't around when this project started" or "… it uses local storage in place of a database".
I've read the documentation end to end multiple times over the years. I'm not sure why that's not enough for me. I just assume I'll run into trouble and I'd like to see an application with routing, component composition, backend calls, and understand a bit about the recommended backend before diving in.