[xcklo]

That seems like a weird regret to have. Like most things there often isn't that much you can do when as the situation evolves as you don't have the luxury of hindsight. Transforming into something completly different isn't going to happen. What they should be bitter about is not being able to compete on their own terms. Microsoft is still one of the, if not the, leader in many market segments. They just haven't really been unable to use that fact. But that is of course a much deeper problem that you probably wouldn't drop in an interview.