I'm just set in my ways. iOS 7 ruined the experience of Apple for me, and Android 5.0, Lollipop also did the same. Even just moving the controls to the left in Unity bugged me as it was just another change for change's sake. Not to mention I've always found Unity quite ugly, and flat. I was dead set against smartphones and hung onto my Nokia 5185i well into 2009, but when I was handed a 3GS and I experienced that skeuomorphic UI for the first time, which made the Nokia feel dated afterwards, I discovered a future where we might see holographic UX in a few years (didn't help I watched the Iron Man movies during that time). It was fun to interact with, and turned a cold, lifeless slab into a literal radio, calculator, camera, or notepad. Flat UI doesn't give me the same adoration, it's cold, lifeless, hard to look at (too white!) and every app looks the same, and it's sometimes hard to find out what's a button or just text. I will never understand flat UI design, and mostly because that's what my obsolete Nokia used, what many 80s computers used and that's one part of that decade I don't miss. They could have picked any part of the '80s to go back to; music, movies, TV shows, but no, they picked the graphics of the Hercules and CGA/EGA era. Makes absolutely no sense. /rant