Foo Inc. does not pivot. Foo Inc. instead re-implements the old stuff via an adapter that is layered over the old stuff so that you get all the unreliability of the new untested stuff plus all of the constraints that made you want to change the old stuff. And then they repeat that, like layers of lead paint and asbestos over each other again and again until your room is barely large enough to stand in because there is a foot or more of toxic paint on each wall. --Sweth