That's great in theory but once an application becomes big and settled it is usually too big to just 'upgrade'. Upgrading becomes a massive time sink and when t

That's great in theory but once an application becomes big and settled it is usually too big to just 'upgrade'. Upgrading becomes a massive time sink and when there's other deadlines pressing for stuff that your clients will actually notice then upgrading won't happen. Ballmer wants to release a new VS every 18 months. Just skip every other major release and save yourself 1/2 the pain and effort.