ASP.NET MVC和Angularjs vs ASP.NET MVC和Reactjs

I have used AngularJs on top of my ASP.NET mvc projects. Even though both AngularJs and ASP.NET are based on mvc architecture I can see some advantages when using AngularJs on top of my ASP.NET mvc projects. The main advantage that I see in this approach is better rendering of views. If so why not use ReactJs with ASP.NET mvc since it is purely focusing on views. Why do we have to mess up with two mvc frameworks. Won't it be better to use Reactjs on top of ASP.NET mvc than using AngularJs and ASP.NET mvc combination (Note that I will always use ASP.NET mvc and I don't want to use a pure JavaScript framework). Please correct me if I am wrong. Thanks in advance. I have used AngularJs on top of my ASP.NET mvc