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Excellent question. My guess is going to be no in 2017 but yes starting late 2018. By then all Apple devices will have USB-C only and Apple will have given everyone a couple of years to get up to date. They will then sell USB-C to USB-A adapters as an extra accessory for those who have "old" computers and chargers they'd like to use.
 
Looks like lightning is out and there's a new cable end in town (It's newer than USB-C).
 
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