Exercise 3: Why a Digital-Only Store Skips "Processing" — Possible Solution
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WHAT "PROCESSING" ACTUALLY REPRESENTS
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Per this chapter, the Processing status specifically represents the
gap between "paid" and "fulfilled" - it exists to track an order that
has been paid for but still needs some further fulfillment step, such
as shipping a physical item, before it can be considered complete.

WHY A DOWNLOADABLE-ONLY STORE HAS NO SUCH GAP
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Per this chapter, a store selling only downloadable products has
nothing to physically ship or otherwise fulfill after payment - the
product is available to the customer immediately once payment
succeeds. Since there is no separate fulfillment step, there is
nothing for the Processing status to represent for this kind of
order, so it commonly moves straight from Pending payment to
Completed once payment is confirmed.

WHY THIS WORKS AS AN ANSWER
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It correctly identifies what Processing is defined to represent (the
paid-but-not-yet-fulfilled gap) and correctly explains that a
downloadable-only store's orders never actually have that gap, since
fulfillment and payment happen at effectively the same moment.