I'm currently using Ember 1.8 and planning to migrate to Ember 1.12. I have gone through many videos and understood that I should follow Component based approach and get rid of ObjectController & ArrayController slowly. But, I couldn't able to crack down how to replace my ObjectController + ArrayController design with Component design.
The main reason I opted for ObjectController + ArrayController design at the first place was to do item toggle (expansion & collapse of item list). How to do the same thing using components?
Future-proofing your Ember 1.x code by @samselikoff. https://gist.github.com/samselikoff/1d7300ce59d216fdaf97 (must be read with conversation).
This helps me. I would recommend to put this on ember blog site. Then Google and Youtube search for "Ember 2.0". (I assume you stay tuned with ember blog.)
PS I know this is very opinionated answer :)