While changes to the Xbox and PlayStation pads have been relatively minor over the years (though that doesn't mean changes haven't been interesting), Nintendo's controllers have been to hell and back over the last 30 years. As this hypnotic gif illustrates.
While the gif above is at a fixed speed, you can adjust things to suit your own pace (and better admire the animation work) here.
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The Evolution of the Nintendo Controller [Gadget Love]