I stumbled across the Ember Computed Decorators plugin plugin a month or so ago and, in my opinion, it leads to really clean code. But, I’m not sure about the status of decorators as a whole. The proposal link is about 2 years old and the blog post referenced on the babel site is a 404 error.
Should I revert to “old style” in any app that’s not just for my own personal use?
As as leader, or member in softwares development we have to thecnical choices at some point. My experience with that give a conservative perspective about new features in production softwares. I prefer keep the things default until it’s added by the core team. For instance, There is some plugins to use Typescript, that has great features also (see angular2), but I still and will continue to use the Ember way.