As a company, Retro-Bit might be big, but it isn't as big as you think, their revenue was <$5M.
That's why most likely they only ordered necessary sum of stock parts, leaving no unused ones.
yeah, that's what I mean.
So, if they did make a "Dreamcast Pro Controller", no point in spending money on brand-new custom parts if they already have boxes full of buttons for previous controllers, so why not use them?
The shoulder buttons of a Sega Saturn controller, the Home and Select of the Saturn Pro Controller and one of it's thumb-sticks to be placed between the ABXY buttons and Start Button and voila! A Dreamcast controller that meets standard modern controllers.
The only parts that will need to be customized would be the shell of the Dreamcast controller and the inner circuitboard to account for the additional buttons.


Glad I'm not the only one who finds this uncanny valley AI generated images.