Underrated in the open source world — whilst at the same time, feels obvious in the writing world? Imagine an author has gotten started writing volumes 1 and 2

Underrated in the open source world — whilst at the same time, feels obvious in the writing world? Imagine an author has gotten started writing volumes 1 and 2, and those volumes became popular — maybe the Harry Potter books as an example. Now, adding more authors with equal "story-line decision making power", or a committee, for volumes 3, 4, 5, is a weird idea, right.