Scrollbars are becoming indeed a problem, but what about struggling to find the right spot on a window corner/border to grab in order to resize it? Did they tes

Scrollbars are becoming indeed a problem, but what about struggling to find the right spot on a window corner/border to grab in order to resize it? Did they test how much of a hassle can be to grab a two pixel wide area on a 13" screen laptop? I can understand they need real estate to be used for actual content, but seriously how hard would be to have a small "handle" that protrudes out of the closest window corner/border when the pointer is like less than 10 pixel away from that, and disappears after say 1 second that it moved away?