There are actually many Microsoft shops that still consider the stuff you listed as too new/unproven. In general, .NET shops are more risk adverse than "open s

There are actually many Microsoft shops that still consider the stuff you listed as too new/unproven. In general, .NET shops are more risk adverse than "open source" shops. Some reasons are cultural, some are business. I think Microsoft is trying to change this as they're clearly growing tired of their own developer base being reluctant to adopt their own technologies.