that’s totally besides the point of how graphics and rendering work. I’m sure there’s *plenty* of people think a small image file is small in memory… and I just chose huge values to make a point, 5000 x 5000 is noticeable as well.
besides, one website might be one tab out of 50. that one background image might be one out of 50, too. so why not have a clue? it’s simply about the mechanics of the thing and common misconceptions.