People, me included, like mehcanical keyboards because the feedback when the key registered is so unmistakably clear both on the way down and on the way up. The worst kind of keyboard is the mushy one where you can't blind type because there's no clear mechanical feedback whether keypress actually registered or not. I'm one of those people who can unconcisously matches the sounds of keypresses to characters typed so when those are out of sync, I notice. The least effort principle doesn't contradict this. I love typing on both of my old Mac wired keyboard as well as my mechanical with inch-high keys.
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