Windows users who just maximize everything all the time and get giant empty white bars on the sides of their browser shock me. What an insane waste of space. You see windows users with Ultrawides and a maximized browser where the site is centered and 90% of the width of the screen is serving nothing but site border and it just makes me scream.

macOS replacing the “Zoom” stoplight buttons with “Full Screen” as the default behavior still irks me. Why would I ever want something full screen other than a video or game?