This is the thing. A lot of companies have started switching away from Mac and now they're switching away I can't see that this is going to be enough to ever tempt them back unless they do something really amazing.

I genuinely love macOS and I'm happy with Apple's offerings on the whole, but I think there's plenty of people who just don't care and are happy with whatever works. If you're using say, Pro Tools or Avid Media Composer or whatever software you use to produce content, odds are it works just fine on Windows too. I think many are going to try Windows, realise this and then simply not bother switching back.