Speaking of outdated concepts, "Apple tax?" Macs have been pretty comparable price-wise when you include all features between them and the equivalent PCs.
But that aside, my objections include:
- Microsoft. Just not a fan of their software and underlying architecture. I don't like NTFS, and keeping system settings in a registry is IMHO heinous.
- The interface. Still don't like it, never liked the Windows 8/10 "I'm on a PC, not a tablet, #$@! it!!" interface. I don't want a half screen of self-updating icons/tiles when looking at the OS. It doesn't matter if it looks like Windows Phone as I would never own one of those, either.
- Driver updates. Never want to deal with them which is why I don't have a non-Apple supplied graphics card in my Mac Pro 5,1.
- Viruses. Having to use a third party solution or Windows Defender, or even think about such things is something I can do without.
- I love Time Machine and its backups to my Time Capsule.
- I prefer Safari as a browser and like iCloud integration.
- I prefer Apple Mail to MS anything or Thunderbird.
- I prefer the OS X Calendar interface.
- I 100% prefer the fact that OS X is built atop of a UNIX variant; if Macs didn't exist I'd try to get by with Linux except for when I needed to use commercial software.
- I love Apple's keyboards and especially their trackpads; I have a Magic Trackpad 2 for each of my Macs. I prefer not to have a multi-button trackpad, though deep clicking my trackpad and gestures are awesome.
- if I'm logged in as an administrator, there should be very little I don't have "permission" to do. OS X has some of these issues too, but in my experience, not as often as I've had them with Windows.
- I love the way if an app crashes in OS X or even if the OS panics I can look at the resulting core file and intuit what went wrong.
I can keep going, and I realize most of those are preference, but in general OS X is still an easier to use, easier to administer, and easier to use day to day than any flavor of Windows I've seen.
I realize others may feel differently and hey, God bless; I just won't go there and could never bring myself to recommend to anyone else that they use it.