I would love to see an example of a scaled 1-person business. The idea is super-compelling in theory, but just the thought of everything involved. - Sales / Marketing - Product / Technology / Engineering - Support / Services (customization changes)

all rolled up in one just seems like an incredible thing.

I think this has to be 1-person businesses are usually service businesses - selling expertise. Would love to see real products which are live and run by 1-people businesses.