Phone calls are like the most obnoxious possible pop-up web ad, taking over your entire display and demanding immediate attention, while being the thing you least care about at that instant. They manage to be worse than ads, too: at least with an ad you’re doing something explicit when the ad appears (like clicking a link); a phone call can literally interrupt you in the middle of typing, and HIDE everything you’re doing! Bonus points if you were about to tap on something and end up tapping one of the buttons on your pop-up phone call instead.

I can’t believe we’re at version 11 of iOS when people needed a backgrounded/tiny phone UI since about iOS 2.