"It seems that most people today, when thinking about their next JS project, will use Backbone because it's the most popularl framework when it shouldn't be." (sic) Here's a long list of examples why maybe it should be: http://backbonejs.org/#examples In comparison, here's the public list of interesting apps built with Angular and Derby: http://builtwith.angularjs.org https://github.com/codeparty/derby/wiki/Community…
"... use Backbone because it's the most popularl framework when it shouldn't be."
You bring up a good point...to add to it, many people also choose to go with YUI, Dojo, EXT when Backbone or a list of small well curated libraries would have been a better fit.
Essentially, the problem isn't Backbone or any of the other libraries/frameworks...it's that there are a LOT of developers that can't seem to evaluate the available options effectively.