ASP.NET Web Forms may have been fine if it was only UI and UI logic rather than an odd mashup of UI + business logic + a crazily complicated page life cycle. The initial versions of ASP.NET MVC used Web Forms purely as a view layer which worked quite well.

At my previous workplace we were converting a classic ASP + ASP.NET Web Forms app to MVC. I really love MVC but I did like the component encapsulation in web forms.