He would probably figure out common patterns/requirements between them and build the best CRUD framework ever (possibly in Haskell), the only problem is that he would be the only person smart enough to use it.
Being 10X for a short duration is much easier than maintaining 10X over years. And also, are these people successful in terms of personal fitness and health? Is their home clean? Do they have good relationships with their family and friends? Do they spend time socializing, or do they spend all their time working? If being 10X is true, why haven't they figured out how to get rich yet?