The number of people who will leave windows over this stuff is trivial.
Apple has practically zero presence in enterprise (where one company can have 60,000 computers), and also practically zero in SMB.
Business software is written for windows. Even trying to use a Mac with the most basic office software is challenging - even if the exact same product exists in both.
People aren't flocking anywhere when their work machines are windows. Damn few people can be bothered with learning 2 ways to do things, especially when they're not interested in computing. I've been at this since before Mac existed, and while I can use OSX or iOS, I'm not wasting my limited learning time on something I rarely use, and can't really integrate with much of the rest I use.
Now let's look at some other arenas:
Legal - they all use a small set of document apps (which until recently was wordperfect), and some legal database apps. None of the database apps run on Mac as far as I've seen.
Engineering - there are practically no CAD apps for Mac. Some do exist, but again, even the ones that are on both Windows and Mac are problematic at best on Mac, typically unable to integrate with the back end.
Most people don't have the bandwidth to learn a new system just to avoid the shitty part of Windows (which only affects home users anyway). It takes less effort/time to figure out how to mitigate the Windows issues than to deal with a completely new system, that will also have issues integrating with other stuff they already have.