I didn't say it didn't. In fact I din't mention Backbone at all.
I said, "Let's not use this opportunity to start another Ember vs Angular argument."
Backbone is a library, not a framework.
Backbone is still a major player in the ecosystem, whatever you call it.
It's more like the ORM. And I use it quite nicely when that's what I need. However, I can't compare it to Ember.js, because it can't replace it and other features in Ember.
Ember and Angular are cars, Backbone are sneakers.