During Microsoft's heyday, if your company used Windows and you wanted to try some other OS, you were out of luck: It would be enormously expensive to transitio

During Microsoft's heyday, if your company used Windows and you wanted to try some other OS, you were out of luck: It would be enormously expensive to transition to another one -- you'd have to buy or write all new software and retrain all your employees. But if you're a Google user and you want to switch to some other search engine... you just switch. Instantly.