2893371

Eh, it gave me the snuggly-wugglies. How could I resist?

Thanks for the favorite.

2862950
Eh, they pressed all, or at least the majority, of my buttons, so of course I was gonna favourite them.

Thanks for the favorite on my story and its sequel.

2582421
At this point, the rule seems too subjective to me to be useful.
Ex. Somebody writes a story, includes changelings not being able to be objects because it would make certain parts way too easy for the characters.
I could see this going both ways- Necessity is subjective.
I don’t see any examples of a story that breaks this rule- Obviously, if somebody adds a non-canon element, it’s because they thought it improved it, regardless of whether it actually did.