As a former .NET guy, I have to take issue with the Microsoft devs chiming in about how great the .NET stack is for upgradeability. Upgrading an ASP.NET web fo

As a former .NET guy, I have to take issue with the Microsoft devs chiming in about how great the .NET stack is for upgradeability. Upgrading an ASP.NET web forms app to ASP.NET MVC is painful, and in many cases requires a full scale rewrite due to the high coupling of front and backend code in WebForms apps. While Microsoft hasn't abandoned Web Forms, it's clearly behind the times in terms of modern web development and Microsoft isn't making much of an effort to bring it up to speed. Comparing the upgrade of a Rails 2.3 app to 3.0 is a much better story IMO, and a far more realistic upgrade for even the largest apps.