Y2K+8

Douglas Purdy of MSFT...

"One of the reasons this topic comes up in Microsoft circles is the
fact that so few Microsoft desktop applications use the CLR. As you
may be aware, there is a performance cost associated with running code
in the CLR and garbage collection often gets painted as the chief
offender."

http://douglaspurdy.com/2008/06/12/objective-c-20-garbage-collection/