I hope MoR doesn’t base its own magical reality on the one evidently depicted in the movies because it just wouldn’t be either as appealing or as coherent.
As I mentioned in another comment, in the MoRVerse it’s strongly implied that all artifacts (which as I said are more clearly categorized as such in MoR than in canon) have some extra durability in them (as Quirrel says the FiendFyre would be used to destroy an artifact like the Sorting Hat) -- so I don’t think you need worry about this.
As I mentioned in another comment, in the MoRVerse it’s strongly implied that all artifacts (which as I said are more clearly categorized as such in MoR than in canon) have some extra durability in them (as Quirrel says the FiendFyre would be used to destroy an artifact like the Sorting Hat) -- so I don’t think you need worry about this.