Well, it depends on what you're using it for. In many cases, the issues we wrestled with are fairly minor. It's only when you have a very large number of data nodes that you run into trouble.

Thanks. My statement is now confirmed.

That was my first thought too, but I'll add that Ember.js and Backbone.js are similar in that regard.

It's not. This use case is pretty niche, and generally not recommended for most apps.