It hasn't. It promised starting shipping Model 3 to people probably end of 2017, people just forgot the original promise. Elon specifically said that the intern

It hasn't. It promised starting shipping Model 3 to people probably end of 2017, people just forgot the original promise. Elon specifically said that the internal deadline (and deadline to suppliers) is sooner, as he was expecting delays, he just didn't know it would be because of the battery plant.