LAST EDITED ON Jan-04-20 AT 06:18 AM (EST)
 
While your friend can be right in many cases, I think it has more to do with an author's inconsistency than the overall "number" of sources they pull from.

While the Eyrieverse may not be 100% consistant all the time - witness the re-relaunch of the Transformers branch, the redo of the Galactic Civil War from one story into a something bigger, the small editorial touches added to the Twilight Saga, UF-Gryphon's return from exile in a Star Trek Universe ballooning from one story into a full saga of it's own - I like to think its more that the creators love their works, but can still look at it and think "Hmm, this is good, but it could be better."

Not all this is apparent in the current iteration of the Eyrie-Productions website; I've been a lurker far, FAR longer here than I've been posting. :)