Who knows--The original calculator could have looked like the one in Windows.
(And why can't it be both relentless devotion to perfection and anal retention? Some people just happen to have refined tastes and the power and intelligence to wield it.)
(Then there is also the question of form vs function, about which I'm getting a hint of you being more on the function end of things. All these questions of "better" and "worth it" can only be answered within some value framework.)