Time to look into Linux, I suppose, since I'm about to become one of those people.
Actually I already migrated most of my things (Evernote, Things, Mail.app) already into Emacs and must say that this old Lisp machine is the best OS of the three^^ So I take the world becoming closed and proprietary as a chance to go back to sanity.
Updates to OS regularly breaks graphics and Wi-Fi drivers for me; after every second update I have to solve "why is everything black" and "why are all videos green".
Of all the things I disliked on OS X when I moved to Linux, instability with updates is even worse here.
Gentoo is notorious for regularly breaking things. Debian has a reputation for constantly being two years out of date because because of their QA process.
Ubuntu is somewhere in between, though lately it has been leaning towards the "Let's change everything every six months!" end of the spectrum. You can mitigate this a bit by sticking to their LTS releases, though. (This is what I'm doing currently.)
I barely see the difference with newer releases anyway, most of the innovation I care is on the web or in high-level applications that run on LTS.
Also if you're looking for quality (opposed to freedom or configurability) Linux on the Desktop really doesn't fit. I adore it on the server, but there isn't a distribution/hardware combination where essentials sleep/wifi/graphics/sound work out of the box. UI inconsistencies are a constant annoyance, dist-updates will always break something etc. It's not an indictment of Linux, it's just that GUIs are terribly hard to get right.
As you note: I reckon Linux isn't much better. I switched to Mac when Ubuntu dropped a bugfix for Ethernet encryption in 13.04 which prevented me from working for my employer (and reduced mouse controls in the UI since 12.04).
I'd pay $200/yr for a maintained OS.