It was a hulking, omakase, MVC? based framework at a time when the oppo was Angular 2.0 & Backbone.js and people still used Bower, then React threw everything on its head in favor of component libraries while NPM came into the mix.
They eventually refactored in components and I think repackaged everything for the new js fe ecosystem, but the battle was already lost.
It didn't go anywhere. Vue.js just became more popular for whatever reason.