Clunky might have been the wrong word for it. Chunky? They're almost always too tall for my liking. I rest my palms on the desk while I type, I don't get how people do that with 20mm tall keyboards without straining their wrists. And I don't think people use mechanical keyboards for the switches themselves, but for the tactile typing experience the switches provide. Hence the appeal of this design: Mechanical, yet slim.