1) The ocean would have to be upgraded before it would float in it at all.
2) It would only hold 1/4 as many people because most of the space in it would be filled with hidden files.
3) There would be an armada of ships frantically trying to catch up with it to deliver security updates and service packs.
4) By the time it got halfway across it would no longer be supported.
5) Bill Gates would be having fits about those horrible open-source icebergs.