…or the first ~3 years of OS X, for that matter.

I have been using it for the last 5yrs or so. While I have run into 1-2 little issues here and there I have never experienced the level of duplicate interfaces that do the same thing and not knowing where to go to do something. While I use OS X as my primary I need to use (and test) with Windows for some things. I feel utterly lost in Win10 (and largely in 8 as well) because the interfaces they force on you make statements about OS X "Fisher-price-y ease of use/dumbing down" pale in comparison. That's what I focused on in my comment:

> Really the dual interfaces to the same thing are the worst part of Windows 10 right now.

Apple's obviously not just letting the technical debt pile up. They've put a lot of effort in to addressing it in a lot of areas. Some of it hasn't resulted in a usable replacement (ZFS, discoveryd), but other areas have been modernized (LLVM, launchd, Core whatever frameworks, Gatekeeper).