I'll throw in my 2 cents here, because why not. I've used (and still do use) a pretty wide variety of Windows products, and I can't stand the UI design of Windows 8 onwards. I understand the theory of why they do it, minimalist design where everything is self-contained and all that, but it still feels like every Windows update takes more power from the user. Trying to change pretty basic settings in 8.1 is significantly harder than on older versions. With the Surface Pro and windows phone it's fine, but the UI designs on 8.1 and ESPECIALLY the Xbox One are baffling to me.

I also don't think it's about being an old fart, I'm on the younger end of the spectrum here at 21, but rather pushing a layout that makes very little sense. I get how tiles work for mobile devices, I still think Windows Phone is a good piece of tech, but consider the Xbox. Unlike a phone, tablet, or computer, navigation of a page is limited to joysticks. Having your nice multi-sized tiles for easy pressing is fine, until you can't press them and end up scrolling in a very confusing way through the page. Not to even start on how clunky and unresponsive that console is as a whole.

This is really only tangentially related to your post, I know, but it's bothered me for a while. It's like Microsoft heard you should maintain a consistent UI design, and just followed that ideal blindly with no consideration of how users actually interact with their devices.