http://www.asp.net/mvc/tutorials/mvc-4/bundling-and-minification
Each project gives you different lights about the technologies you will be using to develop your application.
It also depends on how each team member's knowledge of the technologies you may learn a thing or two new.
MVC-4 is used in the new project I am working on.
I learned about bundling and minification.
"Bundling and minification are two techniques you can use in ASP.NET 4.5 to improve request load time. Bundling and minification improves load time by reducing the number of requests to the server and reducing the size of requested assets (such as CSS and JavaScript.)"
