alt Hacker NewsReminds me of stories about McDonalds introducing new menu items. The logistics of introducing things at all their locations is a major concern. Maybe they could have introduced a new peach desert or something, but like you said supply isn't the only thing - you need to move them around and process them too.
And they usually don't introduce something everywhere at once. They do trial markets, or short-term runs. If something proves very popular (e.g. chicken nuggets) it eventually rolls out everywhere.