Here's my problem with the app close button. It's EXACTLY the same visual design as the delete app button. When designing anything you should keep the extreme

Here's my problem with the app close button. It's EXACTLY the same visual design as the delete app button. When designing anything you should keep the extremes in mind. In this case that would be my 60+yo mum and dad. I'm almost certain that they'll see that black X and think it will delete their solitaire game/Facebook etc. Another anecdote, my dad got an iPhone recently from an old feature phone. One month he got a big data bill, supposedly because of background data. Now he religiously opens the task switcher and kills apps when he's done with them. It gives him a sense of control. Apple had amazing people working on the UX for iOS. Once there wasn't a challenge any more these guys moved to new problems, leaving others who weren't as passionate driving the UX.