People evangelize what works well and Ember works well. Hell, Rails works well. The thing about Ember though is that there' aren't code camps teaching it afaik.
Ember has been an "island of stability" in the front end craziness of the last 5 years. They've navigated the trends pretty well and have a complete and competitive offering.
Ember has been an "island of stability" in the front end craziness of the last 5 years. They've navigated the trends pretty well and have a complete and competitive offering.