I've used Backbone extensively before. It was actually the other way around where I didn't need 90% of what backbone did for what I was doing and just switched

I've used Backbone extensively before. It was actually the other way around where I didn't need 90% of what backbone did for what I was doing and just switched back to jQuery. For situations where I actually do want some kind of client-to-server data-binding, I generally prefer it to provide two-way view<->model binding so I've been leaning towards Angular (as heavy as it is) and Knockout.