MVC 与前后端分离

在wiki里面看到， MVC 对三个 component 的功能作了界定，并且定义了这三个 component 的交互方式。

他在最后还这样说了：

Early web MVC frameworks took a thin client approach that placed almost the entire model, view and controller logic on the server. This is still reflected in popular frameworks such as Rails, Django, ASP.NET MVC and Express. In this approach, the client sends either hyperlink requests or form input to the controller and then receives a complete and updated web page (or other document) from the view; the model exists entirely on the server. As client technologies have matured, frameworks such as AngularJS, EmberJS, JavaScriptMVC and Backbone have been created that allow the MVC components to execute partly on the client (also see Ajax).

问题是：这些前端技术的使用可以将 View 部分移到前端。但是这样子理解的话，这三个组件的交互方式就不是定义的那样子了，这样子还是 MVC 的实践吗？是不是矛盾了？