list before any iterator is taken = [Apple, Banana, Cherry]
beforeWrite.next() = Apple
[writer] added Date and Elderberry - list is now [Apple, Banana, Cherry, Date, Elderberry]

=== beforeWrite iterator was created BEFORE the write - draining the rest of it ===
beforeWrite.next() = Banana
beforeWrite.next() = Cherry
beforeWrite never saw Date or Elderberry, and threw no exception.

=== afterWrite iterator is created AFTER the write - it sees the current array ===
afterWrite.next() = Apple
afterWrite.next() = Banana
afterWrite.next() = Cherry
afterWrite.next() = Date
afterWrite.next() = Elderberry

Final list = [Apple, Banana, Cherry, Date, Elderberry]