Thinking some more about DynamoDB. My thought is, how would apps change if space was free & you could store everything.
30 years ago, user databases were little more than physical card (think library cards). Now a book store has every purchase you've ever made, ...
which enable recommendations. If even more data is collected & stored, even more features will be enabled. (privacy is a polysci issue, I'm sure East German secret police ran on paper cards at some point)
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