During the Renaissance, the five senses were understood to form a hierarchical system from the highest sense of vision down to touch. Vision was correlated to fire and light, hearing to air, smell to vapour, taste to water, and touch to earth.
Perhaps the human fascination with fire stems from the totality of its sensory stimulation. The fire gives a flickering and glowing light, ever moving, ever changing. It crackles and hisses and fills the room with the smells of smoke and wood and perhaps even food. It penetrates us with its warmth. Every sense is stimulated and all of their associated modes of perception, such as memory and an awareness of time, are also brought into play, focused on the one experience of the fire. Together they create such an intense feeling of reality, of the "here and nowness" of the moment, that the fire becomes completely captivating.
No matter how many screen sizes our artboards account for, some user’s browser will break loose from our prescription. With users resizing, rotating, and zooming the screen, new devices stretching, squashing, curving, and cutting (e.g. the speaker area in iPhone X) the screen, the sizes become infinite. Good luck making an artboard for each one of them.
Artboards are a lossy format. Using artboards in a handoff is a lossy process. When we pitch a finite number of plans against an infinite number of situations. We inevitably get in-betweens. Once there are in-betweens, there are unknowns. Once there are unknowns there is guesswork. Once there is guesswork, there are surprises. Engineers take the path of least resistance. We are ones who paved the path.