Microsoft has a very long history of screwing up once they get on top. They're great when they're the underdog doing the chasing, they tend to catch up over time. Once they finally build a great product, you can almost always count on them royally screwing it up. Then the process starts all over again.
It tends to be Microsoft dumping money into something to gain their top status, then once they try to make a profit on it they mess up. Their profit maximization formula doesn't seem to have a field for "will this lose customers?"
