Yep, kudos to the backwards compatibility. Our original stack was Ember and ember-model and we have made the transition to ember-cli and have been tracking ember-cli and are slowly moving the legacy features to ember-data while implementing the new bits in ember-data. While it has not been entirely pain free, we haven't run into any show stoppers and I really like the way the ember ecosystem is shaping up. Big thanks to all the contributors for the attention to minimal breakage.