>because many designers -- often instructed by their customers -- continued to think in terms of layout inseparable from their visual design. Because layout (s

>because many designers -- often instructed by their customers -- continued to think in terms of layout inseparable from their visual design. Because layout (space between elements) is inseparable from visual design, it's what has the biggest impact on visual perception right after contrast (visibility). Doesn't matter if web or analog design, it's a law of nature.