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Re:Amazon soars to more than 341K employees, adding 110K peo... by acchow on Friday February 03, 2017 @02:48PM (#13562653)
A synchronous, blocking logistics system (you going to a store waiting for a person or a conveyer belt) will never be as cost efficient as an asynchronous one (amazon dead-dropping your package on your front porch).

Tho there are other tradeoffs (mainly expected latency).

Re:Amazon soars to more than 341K employees, adding 110K peo... by Qworg on Friday February 03, 2017 @03:00PM (#13562764)
Cost efficient? Shipping isn't free - the last mile to doorstep is the most expensive part as well.
Re:Amazon soars to more than 341K employees, adding 110K peo... by acchow on Friday February 03, 2017 @04:03PM (#13563291)
What do you mean? If you drive to a walmart, you're also spending money on gas and on your car's depreciation. It isn't free.