Man, I'm disappointed. I thought the world was about One-Size-Fits-All!!!
I thought everyone wore size-9 shoes. And those that don't, one just takes a pair of d-yikes and starts lopping off toes.
My guess is the majority of bikes remain more or less as they came from the factory. But, there always those aficionados that want it just so. And always someone willing to sell the parts to get it there.
And, if off-the-shelf doesn't work, there is always full custom, in any material from bamboo to carbon fiber.