The answer is obvious.
The world is populated by "UI Experts" who've never written a line of code in their life, they are "Experts" in "Experience"
I wouldn't trust any of these people to toast bread.
So, can we have a button, top right, which switches between "Their seamless experience" and the old fashioned Windows interface, which simply worked, with an added Up button in explorer, the return to a search which radically just searched files when you wanted to, and didn't wander off searching things just in case you wanted to, and then only searched things it thinks you might be interested in, or marketeers have paid for you to see first.
Completely radical, I recognise, but with the removal of the dozens of background processes, letting Microsoft approve and be aware of everything you do, Windows would absolutely fly.
I don't want whole screens of information blocking everything I do, because I can't minimize it or shrink it without removing it. I don't want a window, just because it's playing music, to look like the turner prize. I just want text menus, buttons that look like buttons and so on.
I don't want an Icon which is what they think save as is, today, and a different icon in the next version of the product. I don't want big flat tiles. If I want to know the news, I'll look at it. If I want my wife to see my porn, I'll show her it, and so I don't want them putting pictures on folder icons showing publically what's in folders that I'm not looking at. I don't want libraries. I want to know exactly where I've put something. I don't want aero peeks. I want all the rubbish chopped off and every CPU cycle going towards improving the performance.
Google is no better. They used to have links to websites along the top. News, shopping etc. Now they're "Apps" and you have to click a link to "Show the Apps" and then wander around looking for it in the morass of coloured pictures.
Why can't Microsoft get it into their thick skull. I don't want their latest style experiment. A computer is a tool for working.