Does the open source stack has this many components ?
http://www.componentsource.com/
So you can build an app faster ?
Show me a grid control as good as
how about data base modeling like
http://download.deklarit.com/files/A...BModeling.html , how about
http://www.telerik.com/products/aspnet-ajax.aspx
If some one asks me to develop a large scale distributed app that will run on a 100 cluster box then I will say go and find a Unix guy but 99% of the work that is out their is not like this.