Spoken like someone who is "perennially wrong, misled and uninformed".
Microsoft has integration among many of their products that OS X simply doesn't have (i.e. Exchange, Share Point, Project, etc). By virtue of them not entering the market, it is clear that Apple doesn't desire to fill this niche. I believe their main focus is consumer level and nothing more.
None of which have remotely anything to do with Windows beyond Anti-trust concerns. Please stick to the subject (and all those products are awful. Sharepoint especially. There are tons of better CMS out there that run on better infrastructure than SQL Server. Exchange's only redeeming factor is Outlook, which is bundled in Office. Otherwise, groupware suites are a dime a dozen.)