"My stress level of fighting machines to do basic things just got lower. And for that, I’ll gladly pay Apple the premium over buying base hardware and doing it all myself."
That's right, there are at least two things even more valuable to the author than having more freedom or the saving a bit of money: His time and sanity.
If you've gotten a computer to, you know, actually get stuff done, why spend any time fiddling with the software and hardware and get stressed out about it? Why even worry about drivers? Why not be able to double click and have stuff just open properly? Why spend hours trying to configure anything? Why not spend just a bit more cash and go from frustration to satisfaction?
This point is central to the reason why Linux, as it stands today, will never become a mainstream desktop alternative.
You sight Windows as having more troubles now than Linux. Fine. But where in the article did the author ever mention Windows? That battle was 10 years ago. The author is not even considering Windows. OS X has been a great desktop environment for years and now even the hardcore Linux enthusiasts are willing to pay Apple to kick the "battle your desktop" habit.
As for meaningful desktop innovation, there's been one thing that Linux desktops (Debian-based distributions, specifically) have that OS X doesn't. One killer feature: Package management with aptitude/Synaptic. Like it or not, aptitude/Synaptic is the best feature that Linux has been able to claim for itself. A one-stop-shop for all of those thousands and thousands of packages. And the upgrades. And the system upgrades. And the dependency management. Graphical, fast, categorized. It has been a wonder to use, truly.
Unfortunately, Apple now has the App Store for OS X and you can actually buy real, usable, curated, and user-rated apps for the desktop and get your updates from the same place. Whoops. Linux doesn't have a killer feature for the desktop anymore, if it ever did.